How well do your fish see outside their watery world? Better than you think.
You’ve already heard that cichlids are smart and have their own personalities. What you may not know is they watch you more than you think. Everyone has a story to tell about their fish grouping together and approaching the surface when a human gets within eyeshot of the tank. Or a story about a particular fish whose behavior changes when it see its human. Why? Your fish have learned to associate you (or something your size) with being fed.
However, they know you’re there because they can see you even if you think they can’t. I’ll give you a couple of examples from my own experience.