Really, I suppose you can only think of the personality of a fish in retrospect. Most people assume that fish are mechanical creatures that don't have feelings and emotions? Actually, they have a personality. When I peer into the fish pond, I have observed the tilapia appear to retreat on sighting my gaze. Have you watched how fish behave during meal times? They appear on the surface with expectant faces . If you look intently, you are likely to see carefully calculated caution and they fast into retreat into the safety of the pond bottom when you make a movement only to briefly resurface to ascertain whether you have brought them something edible. And there is this aspect of bearing. In you briefly remove a fish from the water, it will try to wiggle its way in the direction of the some showing an awareness of self and sorroundings. This is a virgin area waiting to be researched on by ethologists to uncover more exciting aspects of their personalities.