September 2, 2006
From: Denis Riek
Concerning message #17684:
This poor Elysia sp was found this week at Hastings Point. It was moving over algae on rock reef in shallow water. Although not much more than a head it was making fairly good progress, moving in a jerking fashion. It was still very much alive when returned to the water after six days at home in a bowl.
Locality: Hastings Point. Northern New South Wales, 1 metre, Australia, Pacific, 23 August 2006, On algae on rock reef. Length: 6 mm. Photographer: Denis Riek.
firstname.lastname@example.orgRiek, D.W., 2006 (Sep 2) Re: Damaged Elysia crispata. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/17703
Your photo alongside well illustrates what Nick Curtis said about these animals surviving as long as the percardial region was intact. The lump in the middle of the animal is the heart and pericardial region which also contains the kidney opening and the anus. This means the main body organs are still intact and operating, allowing the animal to regenerate its lost half. - but please don't ask me to try and identify it.