Sightening and mating periods in differents species...

Aeg-Cera

Cera-Chro

Colpo-Doris

Durvi-Glau

Glosso-Hyda

Hypse-Noto

Nou-Phy

Phy-Risb

Robo-Umbra

Symbols used in the summary tables

- SB, PB, CD corresponded to Sully Bachel, Philibert Bidgrain and Christophe Cadet observations in Reunion Island during 2010, 2011....

- Number of specimens observed :
             - The number is the number of isolated individuals observed
             - a corresponds to a population between 5 and 10 specimens
             - b corresponds to a population between 10 and 100 specimens
             - c corresponds to a population between 100 and 1000 specimens
             - d corresponds to a population of more than 1000 specimens

- Spawns and matings events :
             - The number is the number of observed behaviors
             - " m " is a behavior observed in a small population
             - " M " is a behavior observed in a large population, such an entire reef ...

Roboastra gracilis

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
1 
2 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
1 
 
 
 
 
 
TOTAL : 
1 
2 
 
 
 
 
1 
 
 
 
 
2 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Roboastra luteolineata

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
1 
 
 
1 
 
 
 
1 
TOTAL : 
 
 
 
 
1 
 
 
1 
 
 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Roboastra cf nikolai

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
1 
 
 
 
 
 
1 
 
 
TOTAL : 
 
 
 
1 
 
 
 
 
 
1 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Sagaminopteron nigropunctatum

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2011 		Less 1m
 
 
4 
a 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
2 
 
 
 
 
 
 
 
1 
2 
2 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
2 
4 
a 
 
 
 
 
 
1 
2 
2 
Spawn :  
 
1 
 
m 
 
 
 
 
 
 
3 
1 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - This species is found preferentially from October to December
         - This species seems to breed preferentially on the lagoon in November to December

Sagaminopteron psychedelicum

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
1 
2 
2 
 
3 
2 
 
 
 
1 
7 
a+4 
Fore reef zone
 
 
 
 
2 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
b+4 
b+5 
9 
2 
 
2 
 
 
 
1 
 
 
Fore reef zone
 
1 
 
1 
1 
 
 
 
 
 
 
 
Others obs Less 1m
4 
2 
 
 
 
 
 
 
3 
 
4 
6 
Fore reef zone
 
 
 
 
 
1 
 
 
 
2 
1 
4 
TOTAL : 
b+9 
b+10 
11 
3 
6 
5 
 
 
3 
4 
12 
a+14 
Spawn :  
6 
1 
 
 
1 
2 
 
 
1 
 
3 
2 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year but preferentially in November-December

Sakuareolis ningunoides

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
1 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
1 
 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Sclerodoris apiculata

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
8 
3 
2 
2 
5 
2 
 
 
2 
b+4 
a 
a 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
6 
1 
4 
 
 
2 
 
 
 
 
3 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
3 
7 
2 
 
 
 
 
 
1 
2 
1 
7 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
17 
11 
8 
2 
5 
2 
 
 
3 
b+6 
a+4 
a+8 
Spawn :  
1 
1 
1 
 
 
 
 
 
 
 
 
2 
Mating behavior : 
2 
1 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year but preferentially from October to March

Sclerodoris coriacea

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
2 
 
 
 
 
 
 
1 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
a 
 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
2 
1 
 
 
 
 
 
1 
1 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
a 
2 
3 
 
 
 
 
 
1 
2 
 
2 
Spawn :  
 
1 
1 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Sclerodoris tuberculata

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
2 
2 
 
 
 
 
 
 
4 
2 
3 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
5 
 
1 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
2 
1 
 
2 
 
 
 
1 
3 
2 
 
3 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
7 
3 
3 
2 
 
 
 
1 
3 
6 
2 
6 
Spawn :  
1? 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
2 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year

Scyllaea fulca

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
2 
 
 
 
 
2 
 
1 
1 
 
 
 
TOTAL : 
2 
 
 
 
 
2 
 
1 
1 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year

Scyllaeidae sp. 1

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
1 
 
 
 
 
 
 
 
 
 
1 
 
TOTAL : 
1 
 
 
 
 
 
 
 
 
 
1 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year

Sebadoris nubilosa

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
2 
1 
2 
 
1 
 
 
 
 
 
2 
2 
Fore reef zone
 
 
1 
1 
 
 
 
 
 
 
 
 
TOTAL : 
2 
1 
3 
1 
1 
 
 
 
 
 
2 
2 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year

Siphopteron michaeli

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
1 
2 
4 
4 
1 
1 
3 
2 
 
5 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
b+a 
b+1 
4 
1 
 
 
 
 
 
 
a 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
a+1 
 
1 
 
 
 
 
 
 
2 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
b+2a+2 
b+3 
9 
5 
1 
1 
3 
2 
 
7 
a 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
1 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year in shallow water

Siphopteron tigrinum

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
 
 
2 
2 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
 
 
 
2 
2 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Siraius immonda

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2011 		Less 1m
1 
 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
1 
 
 
 
 
 
 
 
 
 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Smaragdinella calyculata

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
2 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
2 
 
 
 
 
 
 
 
 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Sohgenia palauensis

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
2 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
 
2 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Spurilla major

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
2 
1 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
2 
1 
 
 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Stiliger aureomarginatus

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
a 
a 
 
 
 
1 
1 
2 
2 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
 
4 
 
 
 
 
 
 
 
 
2 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
a 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
a+4 
a 
 
 
 
1 
1 
2 
2 
2 
a 
Spawn :  
 
1 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude
         - Found usually on the algae Codium sp

Stiliger ornatus

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not data available
         - Found usually on the algae Codium sp

Stiliger smaragdinus

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
1 
 
TOTAL : 
 
 
 
 
 
 
 
 
 
 
1 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude
         - Found usually on the algae Caulerpa sp

Stylocheilus longicauda

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
1+b 
1 
 
 
 
 
 
 
 
1 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
1+b 
1 
 
 
 
 
 
 
 
1 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude
         - Found usually on the algae Codium sp

Stylocheilus striatus

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
a+2 
 
 
 
d+2 
b+1 
c+a 
 
2 
2b+a+2 
5b+a 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
3 
 
SB PB and
CD 2011 		Less 1m
c+2b 
 
1 
 
 
4 
 
 
 
 
3b 
c+3b 
Fore reef zone
 
 
 
1 
4 
 
 
 
 
 
 
 
Others obs Less 1m
2d+b+1 
 
 
 
 
 
c 
 
 
6d+5 
b+6 
d+2c+3a 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
2d+c+3b+1 
a+2 
1 
1 
4 
d+6 
c+b+1 
c+a 
 
6d+7 
6b+a+11 
d+3c+8b+4a 
Spawn :  
m 
 
 
 
 
 
m 
 
 
3M 
m 
3 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Often observed in large population in shallow water preferentially from October to December
         - This species seems to breed in the lagoon at regoupement more or less important

Syphonota geographica

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
1 
 
 
 
TOTAL : 
 
 
 
 
 
 
 
 
1 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Tambja affinis

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Mayotte
PB and EF		 Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
2 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
2 
2 
 
TOTAL : 
 
 
 
 
 
 
 
 
 
4 
2 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Tambja sp. 2

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
1 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
1 
 
 
 
 
 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Tambja limaciformis

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
1 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
 
1 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Tambja morosa

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
1 
2 
b+1 
 
 
TOTAL : 
 
 
 
 
 
 
 
1 
2 
b+1 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Tambja olivaria

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
1 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
1 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Tambja sp. 1

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
1 
 
TOTAL : 
 
 
 
 
 
 
 
 
 
 
1 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Taringa caudata

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
1 
 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
1 
 
 
TOTAL : 
1 
 
 
 
 
 
 
 
 
1 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Tergipes sp. 1

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
2 
TOTAL : 
 
 
 
 
 
 
 
 
 
 
 
2 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thecacera pacifica

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
1 
 
 
 
 
 
1 
 
 
 
 
 
TOTAL : 
1 
 
 
 
 
 
1 
 
 
 
 
 
Spawn :  
1 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thecacera picta

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
1 
 
 
 
TOTAL : 
 
 
 
 
 
 
 
 
1 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thordisa albomacula

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
1 
 
 
 
 
 
 
 
 
2 
TOTAL : 
 
 
1 
 
 
 
 
 
 
 
 
2 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thordisa oliva

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
1 
 
 
 
TOTAL : 
 
 
 
 
 
 
 
 
1 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thorunna africana

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
1 
TOTAL : 
 
 
 
 
 
 
 
 
 
 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thorunna australis

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
1 
TOTAL : 
 
 
 
 
 
 
 
 
 
 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thorunna halourga

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
1 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
1 
 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thorunna horologia

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
1 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
1 
 
 
 
1 
 
 
 
 
 
 
 
TOTAL : 
1 
 
 
 
2 
 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thorunna sp1

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010		 Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
2 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
1 
 
 
 
 
1 
 
TOTAL : 
 
 
 
 
 
1 
 
 
 
 
1 
2 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
1? 

Remarks :
         - Not enough data to conclude

Thuridilla bayeri/gracilis

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
b+2a 
 
 
a 
 
a+2 
Fore reef zone
 
 
 
 
 
 
1 
 
 
 
2 
4 
TOTAL : 
 
 
 
 
 
 
b+2a+1 
 
 
a 
2 
a+6 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thuridilla flavomaculata

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
 
 
 
 
 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thuridilla hoffae

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
1 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
1 
2 
 
TOTAL : 
 
 
 
 
1 
 
 
 
 
1 
2 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thuridilla indopacifica

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
1 
1 
5 
5 
1 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
 
1 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
1 
 
 
 
b 
1 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
1 
1 
 
 
 
b+1 
2 
5 
5 
1 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thuridilla kathae

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
1 
 
 
 
 
 
1 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
1 
 
 
 
 
 
1 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thuridilla livida

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
 
 
1 
2 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
1 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
 
1 
 
1 
2 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thuridilla moebii

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
4 
 
2 
1 
1 
 
b+2 
b+4 
2b+10 
b+6 
a+3 
Fore reef zone
 
 
1 
 
 
 
 
 
 
1 
 
 
SB PB and
CD 2011 		Less 1m
3 
a+3 
3 
1 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
5 
1 
 
 
 
 
 
 
 
 
Others obs Less 1m
3 
1 
 
 
 
 
a+1 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
2 
 
2 
1 
1 
TOTAL : 
6 
a+8 
9 
4 
1 
1 
a+1 
b+4 
b+4 
2b+13 
b+7 
a+6 
Spawn :  
 
1 
 
 
 
 
 
 
m 
2 
 
1 
Mating behavior : 
 
 
 
 
 
 
 
 
m 
 
 
 

Remarks :
         - Seems observed during all the year but preferentially from Jully to December

Thuridilla multimarginata

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
1 
 
 
6 
2 
 
 
 
4 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
 
1 
 
 
 
 
 
 
 
 
1 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
2 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
2 
 
 
6 
2 
 
 
 
4 
1 
2 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thuridilla undula

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
 
1 
8 
8 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
 
 
 
 
 
 
 
 
 
1 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
1 
TOTAL : 
 
 
 
 
 
 
 
1 
8 
9 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Thuridilla vatae

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
1 
1 
2 
 
7 
5 
1 
a+1 
b+6 
a+1 
2 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
4 
 
2 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
1 
 
 
1 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
2 
 
 
 
 
2 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
1 
TOTAL : 
5 
21 
4 
 
8 
5 
3 
a+1 
b+6 
a+1
2
4
Spawn :  
 
 
 
 
1 
 
1 
1 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year but preferentially from August to October

Thuridilla virgata

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
 
2 
 
 
 
 
Fore reef zone
 
 
2 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
 
 
 
 
 
 
 
 
 
 
1 
 
Fore reef zone
2 
 
 
1 
1 
 
 
 
 
 
 
1 
Others obs Less 1m
 
 
 
 
 
 
2 
 
 
3 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
a+1 
 
1 
TOTAL : 
2 
 
2 
1 
1 
 
2 
2 
 
a+4 
1 
3 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Trapania euryeia

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
1 
 
TOTAL : 
 
 
 
 
 
 
 
 
 
 
1 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Trapania naeva

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
1 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
2 
 
 
 
 
1 
2 
1 
3 
 
 
 
TOTAL : 
2 
 
 
 
 
1 
2 
1 
4 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
1 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Trapania sp1

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
 
 
2 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and
CD 2011 		Less 1m
 
 
1 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
1 
 
2 
 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Trapania toddi

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
1 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
1 
 
 
 
 
 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Trapania vitta

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
1 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
1 
 
 
 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Trinchesia yamasui

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
 
 
 
 
 
1 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
 
 
 
 
 
1 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Tritoniopsis elegans

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
1 
 
 
 
 
 
1 
 
1 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
1 
 
 
 
 
 
1 
 
1 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Umbraculum umbraculum

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
SB PB and
CD 2010 		Less 1m
 
 
2 
 
 
 
 
 
 
1 
2 
2 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
SB PB and CD 2011 Less 1m
3 
 
 
1 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
3 
4 
 
3 
 
2 
 
 
1 
2 
6 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
6 
4 
2 
4 
 
2 
 
 
1 
3 
8 
3 
Spawn :  
 
4 
 
 
 
 
 
 
 
1 
 
 
Mating behavior : 
2 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Seems observed during all the year in shallow water

Volvatella angeliniana

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
1 
 
 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
1 
 
 
 
 
 
 
 
 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Volvatella cf. vigourouxi

 
Jan
Feb
March
April
May
June
Jully
August
Sept
Oct
Nov
Dec
Others obs Less 1m
 
 
 
1 
 
 
 
 
 
 
 
1 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
1 
 
 
 
 
 
 
 
1 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Symbols used in the summary tables

- SB, PB, CD corresponded to Sully Bachel, Philibert Bidgrain and Christophe Cadet observations in Reunion Island during 2010, 2011....

- Number of specimens observed :
             - The number is the number of isolated individuals observed
             - a corresponds to a population between 5 and 10 specimens
             - b corresponds to a population between 10 and 100 specimens
             - c corresponds to a population between 100 and 1000 specimens
             - d corresponds to a population of more than 1000 specimens

- Spawns and matings events :
             - The number is the number of observed behaviors
             - " m " is a behavior observed in a small population
             - " M " is a behavior observed in a large population, such an entire reef ...