Chromodoris quadricolor from Saudia Arabia

April 2, 2001
From: Larry Dupriest


These photos were taken in the summer of 2000 along the Red Sea shoreline about 100 km north of Yanbu, Saudi Arabia (near the Yanbu Cement Plant). This is an area where the coral reef parallels the shore about 75 feet out. The reef is a vertical 50' drop of live coral teaming with fish varieties. These nudi's were found in the 2-3 feet deep shallows about half way out to the reef.

I have sent the C. elisabethina photo because of Cody's question about its food. It will give Cody an idea of the mossy areas where these are commonly seen. Is this a food source?

Larry Dupriest

dgdupriest@gtis.net

Dupriest, L., 2001 (Apr 2) Chromodoris quadricolor from Saudia Arabia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4104

Dear Larry,
Thanks for the photo. The animal is in fact Chromodoris quadricolor rather than Chromodoris elisabethina which seems to be confined to the western Pacific. Concerning the 'mossy' stuff your animal is crawling on. That is algae (sea weed) and just because the nudibranch is crawling over it, it does not mean that it eats it. C. quadricolor, like all species of chromodorid is a specialised sponge feeder. Sometimes, when it eats out a colony, it has to go for a walk to find a new sponge colony. Or perhaps it is looking for a mate?

Could you let me know what 'summer' means? I prefer to have a month so that there is no ambiguity.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Apr 2). Comment on Chromodoris quadricolor from Saudia Arabia by Larry Dupriest. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4104

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