Raising Hermissenda for research

April 29, 2005
From: Daniel Swezey

Hello-
I'm raising ~40 Hermissenda crassicornis for an undergraduate research project. Each Hermissenda is housed individually in a smally plastic tuper wear container with 15 holes poked in it. The containers are in a small tank immersed in water with a two-way fresh sea water flow system. They nudibranchs had been doing fine until recently when I've been getting slight die off. Over a period of a week, I've had 10 individuals slowly die in their containers (I find them turned on their sides with cerata fallen off in a clump). I can't correlate this death with size, position in the tank etc. as it seems totally random.

Does anyone have any ideas/advice for raising these animals? I've been feeding them fish food pellets (which is listed in the primary literature as a viable food) with a protein concentration of 40%. They had been doing fine for 2 weeks, and only recently have I had this problem. Any insight/information is greatly appreciated!

Daniel Swezey

solardan@umail.ucsb.edu

Swezey, D.S., 2005 (Apr 29) Raising Hermissenda for research. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/13656

Factsheet

Hermissenda crassicornis

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