Tambja affinis

(Eliot, 1904)

Tambja affinis
Photographed by: Christian von Damm

Kingdom:Animalia
Phylum:Mollusca
Class:Gastropoda
Subclass:Opisthobranchia
Order:Nudibranchia
Suborder:Doridina
Family:Polyceridae
Species:Tambja affinis

Comment from Nathalie Yonow on photo #25248
There seems to be a few of this in Indonesia.

Comment from Richard Willan on photo #5616
This individual agrees with typical Tambja affinis in having a broad, pale creamish green band on the rhinophoral sheath and narrow black longitudinal lines on the mantle, but it differs in having completely black rhinophores like T. victoriae. It demonstrates, yet again, that these two supposed species may not be different at all. Another example of the problems in separating these species can be found on Nudi Pixel at Tambja affinis page

Comment from Richard Willan on photo #3620
This individual is special because its rhinophoral clubs are translucent yellow with a blue tip – a colour pattern supposedly found only in the closely related species Tambja victoriae. So the distinction between Tambja affinis and Tambja victoriae now rests on the rather arbitrary choice of rhinophore sheath completely pale greenish yellow [as in this photo] (= Tambja affinis) or rhinophore sheath with a broad pale blue green marginal band (= Tambja victoriae).

Locality:

 

Pictures of Tambja affinis

Tambja affinis from MadagascarIdentification reviewed by Terry Gosliner
Location: Madagascar
Posted 8 years ago
Viewed 1143 times
 
 

Similar Species

Author: Dr. Richard C. Willan

Roboastra luteolineata: Feeds voraciously on other nudibranchs; has very large oral tentacles; two pale stripes on the head between the rhinophores, neither of them expanded; no colour band around the rhinophoral sheath.

Tambja affinis or Tambja victoriae: Feeds on bryozoans; has relatively small oral tentacles; one pale stripe on the middle of the head between the rhinophores that is expanded; pale colour band around rhinophoral sheath.

Since they are so similarly coloured overall, perhaps some mimicry is going on.

The ways to separate Tambja affinis, Tambja victoriae and other Tambja species are set out nicely and clearly on Tambja affinis colour group in the Sea Slug Forum

Tambja gabrielae from Bali, IndonesiaIdentification reviewed by Marta Pola
(66 photos)
Tambja olivaria from Malapascua, PhilippinesIdentification reviewed by Nathalie Yonow
(12 photos)
Tambja victoriae from Bali, IndonesiaIdentification reviewed by Richard Willan
(4 photos)
 
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