Re: Update on Hermissenda ailments

July 30, 2003
From: Rosemary Romero

Dear Ian,
Concerning the messages about sick Hermissenda. I'm an undergraduate at the University of California, Santa Cruz and am working with Hermissenda crassicornis for my senior thesis. I don't know how to "get rid" of the bubbles but I have observed these gas bubbles after transferring slugs from one container to another using a paint brush, I now use a ladle and find that this alleviates the problem. I noticed that Dr. Rudman cited two species that like to float upside down at the water surface; I too have noticed this with the Hermissenda that I'm using in my experiments.
Best wishes,
Rosemary Romero

rromero@ucsc.edu

Romero, R., 2003 (Jul 30) Re: Update on Hermissenda ailments. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10497

Thanks Rosemary,
It is strange that using a paint brush causes bubbles to develop inside the animal. Perhaps the bristles puncture the skin of the animal? Concerning animals upside down oon the water surface. What you are probably observing is your animals crawling along upside down on the surface film. Many nudibranchs and snails do this in aquaria and in rock pools at low tide. It is quite different from Glaucus and Glaucilla which truly float.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Jul 30). Comment on Re: Update on Hermissenda ailments by Rosemary Romero. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10497

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Hermissenda crassicornis

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