My lil red guy is really affectionate to me, though I thought he just wanted food. But when I went on a trip & left my sis to do the feeding, he refused to eat from her the whole time. Also I & my dad think he hates my dad, Sh acts all "hissy" I guess is the word when he's in the room. (hand feed)
Another fish I have thats affective is my sengal Bichir, still a cool species though alot smaller. He swims to the surface & plays around to get my attention when I come by & has allowed my fingers to pet him. (don't hand feed)