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Today it is considered in the world of Ichthyology , the view of the majority of the fish are well adapted to the perception of motion , and yet have deficiencies in the transmission of the shapes of objects .
Among the fish that have higher visual acuity are those who live near the water surface . Fish swimming in the margin of barely a few meters deep and between our Pterophyllum found .
Teleost ( bony fish ), have a color vision quite good , although the density of cells formed by the retina 's rods and cones lower than humans , so that you can reach your guess vision is inferior to ours .
As we mentioned fish living closest to the surface in turn have sharper vision and better distinguish colors, Pterophyllum is no less and so we were able to surprise them with a test we did with their response to colors.
The test that underwent juveniles ( Angelfish ) , came after realizing that they came to the surface to catch the boat which supplied them with food, at that time we arose the question, ? Identified the boat, the gesture , color , movements to approach ? ...
Was decided to perform a test in which we proceeded to line the pot with different colors of cardstock, placed just behind the aquarium and hand moving laterally would teach them the can of food , until the jackpot is always had been feeding , in this case a commercial where the yellow color is predominant , along with some red lines and drawings .
Obviously throwing end test more than a simple identification of color, it gives us samples of primary association between two elements ( color and food) . We further questions arise , will they have more complex associations ? , A two-color identification response would obviously the brains of our Angelfish and our fish is more complex than it seems at first glance ( and never better employed the phrase ) .
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