Thanks,I used to keep saltwater but I certainly don't recall ever seeing that fish before,not even in photos in any of my books.Cool insight!
You are right, though - this is a marine tank. The fins undulate also.
It's a shame the aquarium doesn't have any posted information on the fish.You're right - Never seen anything like this in any of my old books, etc., or even at any other Aquarium. I did reach out to the Aquarium via facebook - no response yet.
It was about 20 inches or so.How big is it?
Definitely looks cichlid like, even if it’s certainly not.