I work at a wal-mart store and take care of the fish, tonight at work i noticed a crustaceaus looking creature attached to one of our feeder goldfish-common goldfish whatever you want to call them. this is the first time i've ever seen on of them before, I peeled it off the face of the goldfish and I think he was much happier he was swimming all happy so I quarantined him from the rest. The poor little goldfish had him attached right to the top of his mouth inbetween his eyes. These things look just like those triops things you can raise, nasty little buggers.