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 ...

Doto ussi

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

Remarks :
         - Not enough data to conclude

Durvilledoris lemniscata

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

Remarks :
         - Not enough data to conclude

Durvilledoris pusilla

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

Remarks :
         - Not enough data to conclude

Elysia obtusa

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

Remarks :
         - Not enough data to conclude

Elysia ornata

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

Remarks :
         - Not enough data to conclude

Elysia rufescens

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

Remarks :
         - Seems observed during all the year on the lagoon

Elysia sp 1

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

Remarks :
         - Not enough data to conclude

Elysia sp 2

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

Remarks :
         - Not enough data to conclude

Elysia sp 3

 
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 
 
 
2 
 
 
 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Elysia sp 4

 
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

Elysia sp 5

 
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

Elysia sp 11

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

Remarks :
         - Seems observed preferentially during all the year on the lagoon

Elysia tomentosa

 
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
 
 
 
 
 
 
 
 
 
 
 
2 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
Others obs Less 1m
 
 
 
1 
 
 
1 
 
 
 
 
 
Fore reef zone
 
 
 
 
 
 
 
 
 
 
 
 
TOTAL : 
 
 
 
1 
 
 
1 
 
 
 
2 
2 
Spawn :  
 
 
 
 
 
 
 
 
 
 
 
 
Mating behavior : 
 
 
 
 
 
 
 
 
 
 
 
 

Remarks :
         - Not enough data to conclude

Elysia trisinuata

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

Remarks :
         - Not enough data to conclude

Elysiella pusilla

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

Remarks :
         - Not enough data to conclude.

Embletonia gracile

 
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

Ercolania coerulea

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

Remarks :
         - Not enough data to conclude

Ercolania kencolesi

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

Remarks :
         - Not enough data to conclude

Eubranchus sp. 1

 
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

Euselenops luniceps

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

Remarks :
         - Not enough data to conclude

Facelina rhodopos

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

Remarks :
         - Not enough data to conclude

Facelinid 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 :
         - Not enough data to conclude

Facelinid sp. 2

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

Remarks :
         - No data available

Facelinid sp. 3

 
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

Facelinid sp. 4

 
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

Favorinus japonicus

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

Remarks :
         - Seems observed during all the year

Favorinus mirabilis

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

Remarks :
         - Seems observed during all the year on Hexabranchus spawns

Favorinus cf mirabilis

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

Remarks :
         - Seems observed during all the year on Hexabranchus spawns

Favorinus tsuruganus

 
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

Flabellina bicolor

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

Remarks :
         - Seems observed during all the year but preferentially in December
         - Breeding period in December, we need confirmation

Flabellina bilas

 
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

Flabellina exoptata

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

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

Flabellina riwo

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

Remarks :
         - Seems observed during all the year

Flabellina rubrolineata

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

Remarks :
         - Seems observed during all the year

Fryeria marindica

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

Remarks :
         - Seems observed during all the year on lagoon and fore reef zone

Gastropteron bicornutum

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

Remarks :
         - Not enough data to conclude

Glaucus atlanticus

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