what is the smartest fish?
It's usually held that predatory species tend to be pretty clever, because they need to outsmart their prey.
Some of the marine angelfishes are considered quite intelligent.
I've also heard it claimed that some shark species are quite intelligent, [ although in most respects sharks are primitive fishes.
Cichlids are among the most intelligent of freshwater fish families. Sometimes their
behavior seems amazingly aware and thoughtful.
There are no new answers.