This is a great website full of info http://www.seaslugforum.net/ I LOVE Nudi's but whole heartedly agree with Sushigirl. They will ultimately starve to death in our aquariums. [smilie=crying.gif] My Spanish Dancer Nudi died after three weeks, the lfs said he was an algea eater. THEN, I researched. The only succesful keeping of them is done buy divers who collect them while they are feeding and collect their food at the same time. This would be practical only if you could raise/grow more food for them, which is a super rare instance. The divers usually have to return to the source and harvest more food for them. Very sad they do not stop collecting them for our hobby. Bill Rudman is the person who ran the seaslugforum, and who I was communicating with about them. Another good link, http://www.theveliger.org/nudibranch_food.html I wish you the best of luck, they are so beautiful! Maybe you will get lucky and he will find some sponge in your tank he can eat.
