stop using such big words...
I think
@Rusty_Shackleford ... is correct, and that is generally the case... but, every once in a while a critter displays an action that doesn't seem to fit only in the survival traits... it's been years ago, but, I had a few dwarf orange crayfish, that repeatedly took turns, catching a bubble, from an air stone, floating to the top of the tank, and gliding back to the substrate, while the others seemed to watch. I'd swear you could hear a tiny "wheeee", as they glided down... they did this over and over for an hour or more each day... maybe in their tiny brains, they were trying to escape, and didn't remember doing it a few minutes before, or the previous day for a week...
panda garra seem to find joy ( at least they typically bring joy to their owners with their antics )... many of the loach family are similar from clown loaches on down, to the much smaller two, listed in the OP...
and most everyone has had that fish that seems to recognize us, and begs for food, doing crazy antics in an attempt to get us to notice them, and toss them a biscuit... being as I feed from behind my main group of tanks, all of which have backgrounds... the feeding process is more natural, but I have had many cichlids in the past, that were in solitary tanks, and were fed from the front, that did not take long, before they interacted with me... I've seen gold fish trained to do tricks... so if they can learn, it's not too much of a stretch to see the dwarf crays screaming out "wheee" as the bubble pops at the surface, and they glide back to the substrate...
I do believe we have much to learn yet, and may be surprised, at how different our current views are... for example, the sport fishing group saying fish don't feel pain, when their nervous system seems complex enough, that they should, only because we don't want to think about inflicting pain... ( I'm pretty grounded ) and I'm sure I inflict pain on anything I hunt, weather fish, or deer, but it's part of the process I accept if I'm going to partake in those activities, and is partly why I don't hunt or fish for sport, only as a source for food, or in the case of rabbits or red pine squirrels , as varmint control, either way I accept that I'm inflicting pain, and I'm not going to brainwash my self otherwise, just to make me feel better...
