I have had a blue ribbon eel who was very personable,and would be waiting to be fed Rosie's( feeder fish) every day @ 3 AM.What could be more of a cute pet than that.Sort of had me hypnotized into waking up early everymorning to feed him.He escaped and died on the floor,unfortunately.I had gone to elaborate measures to have a tight lid on the aquarium ,but he found a 2 mm opening.It was a very sad day,as I found I had been getting attached to it for several months.
My current species,is a Bluespot ribbontail ray is similarly a nocturnal eater.You can call him a real pet to,as he comes to you to be fed and begs.I must still be hypnotized into waking up @ 3AM. to feed that one too.