I thought the original poster was worried about the sea slugs he found on his live rock...my badA lot of sea slugs can be kept successfully. The Lettuce Slugs are a good example. Unfortunately, most of the really colorful ones are Nudibranch and require a specialized diet. There are a few exceptions but most of these cannot be kept long term successfully.
Hi,I was, like many, origionally drawn to be interested in these animals when seeing the colors and diversity in these creatures. After a bit of research, I quickly ruled out any sort of nudibranch. Some of the sea slugs and sea hares though still looked awesome and seem like they are easier to care for. I would be interested in any opinions or suggestions about having them in a home aquarium.