I'm finding it pretty profitable. I send my cat to the beach to fish for a while and gets lots of nice fish. The ones under $100 I keep for fertilizing the garden. The others I'm selling. In just 15 minutes, I've made over $1000. His hunter skill is maxed but cats seem to be able to catch any fish in the game, no matter the water - even stuff you'd only get on vacations. The couple dragon fish he's caught so far were very nice at over $200 each. Also, there's less wait than 'stalking for prey'.