Cyerce cristallina from Croatia

August 28, 2006
From: Tom Turk

Dear Bill,

I am sending you two photos of the sea slug probably Cyerce cristallina. The photos were taken on a night dive on the rocky bottom covered with algae at the depth of approx 10 m. Location Susac Island, Croatia, Adriatic sea. According to the photographer the animals were 5 and 8(?) cm long. Could you confirm the species indentification.

Locality: Island Sušac, Adriatic sea, 10-12 m, Croatia, Adriatic, July, 2006, rocky gottom covered with algae. Length: 5, 8 and 20 cm. Photographer: Borut Furlan.

Best regards,
Tom Turk

Turk, T., 2006 (Aug 28) Cyerce cristallina from Croatia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Tom,
Thanks for these photos. It's good to get another example from the Mediterranean region. This is a much duller version of the species when compared with the wine red coloured 'typical' specimens we have on the Forum. The few patches of yellow spots on some of the anterior cerata clearly link this to the red patterned specimens. Looking at your photos, I am fairly confident an earlier message from Florida [#6047] is also this species.

Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Aug 28). Comment on Cyerce cristallina from Croatia by Tom Turk. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Cyerce cristallina

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