Thecacera picta    Baba, 1972

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This species has been observed on Reunion and Madagascar Islands

Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Polyceroidea
Family : Polyceridae
Distribution : Indo-West Pacific
Maximal size : 20 mm
Abundance : Seldom if ever on the fore reef zone

Species characteristics :

These small nudibranchs are very distinctly patterned translucent cream to grey with black/dark brown, orange and opaque white markings.

Orange and opaque white markings are localised on the partial rhinophore sheaths, tips of the rhinophores, gills processes and tail.


thecacera picta
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Photo Alain-Benoît Rassat
Madagascar, Anemone 2, Nosy Be, 14 m, September 2012, size : 40 mm

See more about : Sightening and mating periods

Remarks :

Identification confirmed by Nathalie Yonow
    Synonymous (according worms) :
          - No other name

Bibliographic data :

The body pattern seems to be very variable :
          - The presence and importance of opaque white and orange markings are very variable on the partial rhinophore sheaths, tips of the rhinophores, gills processes and tail.
          - The black/dark brown coloration of the body is variable in form (dots and/or lines) and amount.
    The body is elongate, tapering to the tail
    Found on arborescent bryozoans in areas with strong currents

References :

Bill Rudman Seaslug site : Sea Slug Forum : Thecacera picta
    Nudipixel Thecacera picta

Publications :

Baba, K. (1972). Thecacera picta spec. nov. from Suruga Bay, Japan (Nudibranchia: Doridoidea: Polyceridae). The Veliger, 15(2) : 88-90

Other photos of Thecacera picta :

Alain Diringer

Réunion, Saint Gilles, 22 m, December 2014,

 More photos from Indian Ocean

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