Re: Elysia crispata - egg coil

October 15, 2000
From: Kathe R. Jensen

Dear Bill & John,

Concerning John's message, Elysia crispata [or Tridachia] actually has lecithotrophic development. This means that the larvae are only free-swimming for a short period of time, and do not need to feed in this stage. If you want to get them to metamorphose you should have some of the green alga Caulerpa verticillata (a very finely branched species, which looks a bit like a tiny Christmas tree), which is the preferred food of the juveniles of this species (see Jensen & Clark, 1983).

Reference:
Jensen, K. & Clark, K.B. 1983. Annotated checklist of Florida ascoglossan Opisthobranchia. The Nautilus 97: 1-13.

Greetings,
Kathe

jensen@ait.ac.th

Jensen, K.R., 2000 (Oct 15) Re: Elysia crispata - egg coil. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3174

Dear John,
This greatly increases your chances of breeding some babies. They will only need to spend a short time as swimming larvae, and during that time they do not feed. However to trigger their change (metamorphosis) from swimming larva to crawling slug, they need to settle on their adult food which is the sea weed Kathe mentions.

Kathe, does your '(or Tridachia)' mean you have doubts about this species being an Elysia or are you just noting the name change?

best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Oct 15). Comment on Re: Elysia crispata - egg coil by Kathe R. Jensen. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3174

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