Weird nudibranch
 

Yet another nudibranch, this one much larger than all the previous ones I've found in my tank. Probably 2" long fully extended. Tan/yellow-green body, greener on tips of "branches", tiny blue spots all over.

Any ideas on whether he should stay in the tank, the fuge, or come out altogether?

http://reefcentral.com/gallery/data/500/18897nudi3.jpg

http://reefcentral.com/gallery/data/500/18897nudi2.jpg

http://reefcentral.com/gallery/data/500/18897nudi1.jpg

No advice but it's sure creepy looking :evil:

He's a monster among nudibranchs. I tried poking around on seaslugforum.net but the only listing is by species, not location, colouring, size, etc. As he is green, I am assuming he eats algae, therefore I am tempted to put him back. He's a similar colour to the sea hares we see in local shops here, but of course the body shape is very different.

Success! I am nearly positive he is the species described at http://www.seaslugforum.net/stylstri.htm, a sea hare, not a nudibranch. Consumer of algae, and therefore he is back in the tank.