A fish that drinks like a fish, that is a fish in excess
A fish that fishes in troubled waters, that is a fish taking advantage of another fish in trouble
A fish that fishes or cuts bait, well, to be or not to be, to retreat or to attack, that is the fishy question
A fish that is neither fish nor fowl, is a fish that is neither one nor the other, lacking some convictions
A fish out of water, is a fish feeling left out, no longer in his accustomed environment
Do you have other fish to fry for now?
Is there other matter requiring my attention?
the lake is finally fished out from his fishy mind.