Meowzer Here is what a fellow reefer who has a lot of experience in the hobby
has to say "They are an interesting little sea slug. There are a couple variations and I believe both of them are Caribbean critters. They eat algae and some folks seem to be able to sustain them. You will need good lighting to help them support photosynthesis. They incorporate zooxanthellae into their tissue and photosynthesis provides an important part of their carbohydrate requirements. They need a lower flow environment and no indwelling pumps as PHs will do them in.....not might....but will......... it is only a matter of when. They are interesting, but short lived and for about $25....what I saw them going for.....they might best be left.....unless you really really like them and can provide a low flow tank." None of the words in the quote are mine they belong to a person named Patrick.