i just took a trip to china town in SF, and i went to a fish store that had an incredible selection of marine fish that i have never seen sold before, one thing that caught my eye was the wide selection of sea slugs they had, im assuming these slugs graze on live rock and algae and such so they would probably do best in a reef tank but would they do alright in a fowlr? are there any fish that prey on these slugs? they didnt have labels at the store but im pretty sure the following two links were what i saw
http://www.edge-of-reef.com/opistobr...ra-varians.jpg
http://www.ocean-photo.de/bilder/rdi_1189.jpg
any info on these would help thanks