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hi i was wondering if i could buy one of this thing
and is it easy to take care of ?
http://i1053.photobucket.com/albums/...06956371_n.jpg

That is a very interesting looking critter! No idea what it is, though.

Looks like an alien. :P

What is that???!!!$&@&$&&$

Very interesting! What's mouth look like & I can't notice if there is any gill from the photo or I'll think that it looks like a bat fish of some kind.

I'm thinking that it is a sea slug of some variety.

It is Glaucus atlanticus.

Despite their often dubious content, here's the wiki article:
http://en.wikipedia.org/wiki/Glaucus_atlanticus

Here is the WoRMS entry:
http://www.marinespecies.org/aphia.p...ails&id=140022

Edit:
According to this article (http://www.seaslugforum.net/find/glauatla) they feed almost exclusively on Physalia (hydroids). It is probably not a good choice for an aquarium, as food could be in short supply (unless one has a booming population of colonial hydroids . . . though I think these guys prefer the Portuguese Man of War).

I feel these would be very hard to keep alive for any long length of time!

You would also first have to find one haha

Too bad its diet is so strict, its so beautiful