Sunfish are very smart fish, much smarter than the
carp family (koi, goldfish, etc). Sunfish in an aquarium will stare at
you and watch you

Not arguing the smartness factor, but I've had young koi in aquariums swim
to the glass when I approach and wag their tails as furiously as a new
puppy to get fed. Always worked on me too. ) ~ jan


(Do you know where your water quality is?)