Nudibranch? ID? (clear pics)

[mike1962]

I discovered 2 of these small guys in my new tank. To my uneducated eye they appear to be nudibranchs. They are about 3-4 mm in length, dark green with splotches. Can't seem to ID these, and don't know whether they are good or bad with corals. Anyone know what they are ?

http://www.flickr.com/photos/kamwene/1065114554/
http://www.flickr.com/photos/kamwene/1065114772/


Thanks,

Michael

 

[greenbean36191]

They're not nudibranchs. They appear to be Elysia. They will eat some sort of algae, but I'm not sure what algae that would be. Did they come in on Caulerpa or another macro?

 

[mike1962]

Hi Greenbean,

Thanks for the info. They came in on some LR, which did have Caulerpa, as well as some Halimeda, what appears to be Turtleweed, and unfortunately bubble algae as well. The Caulerpa is no longer present, but the others remain at this point. In observing them, they appear to be grazing on algae growing on the LR, but this is unclear. It's difficult to observe them since they are so small.

Mahalo nui loa,

Michael

 

[mike1962]

Elysia mercieri

Elysia mercieri

Hi Greenbean,

I found a sea slug forum, and went through their list of Elysia and found that what I have appears to be Elysia mercieri. Just thought you might find if of interest. Wish there was more info available on these guys.

The link to where I found it is as follows:

http://www.seaslugforum.net/factsheet.cfm?base=elysmerc

Aloha,

Michael