well, i trained a 3 inch oscar to swim through a hoop when i flicked the water (and only when i flicked the water)... I compared it to a sunfish (same size, didn't associate the hoop with food, just swam through it to get the food on the other side) and a venustus (same size, scared of it). the oscar was the only one to actually associate the hoop and flicking the water with a food reward. I worked on training all 3 at the same time in seperate tanks over a course of approx. 2 months, 5 days a week. it was a project for school. the oscar learned the hoop trick in a couple weeks, then went on to learn to do it on command. the hoop was only in each tank for the time I was working on each individual fish. after the trials, i removed the hoop and hid it from their line of sight.
Even when i moved the oscar temporarily to a smaller tank for display (project fair) she still did it only after 1 day of being in there! Oscars are the smartest fish i've tested... I'll eventually do it again using a new oscar and a few south/central american cichlids.
Yeah man Ill 2nd that ! Oscar are the smartest fish Ive owned.
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