Fish come in every color you can imagine. There are even some fish whose bodies are totally transparent!
Most schooling fish tend to have colors of reds or blues with different patterns. Three common schools of fish are tetras, barbs and danios..
Some fish such as cichlids will change color as they mature. Another reason for fish to change color is stress. When fish stress out they can loose almost all of the color until they calm down.
a clown fish most times has a pattern of orange, black, white, black, orange
Most fish get very light colored when stressed, but some become very dark. Basically, a drastic color change indicates a problem.
Yes, fish see most colors. Red, in fact, is a good color for bass lures.
The color red becomes invisible in lower water depths. That's why new fishing lines are made red in color.
blendable fish means that there has to be two different colors in order for the color to blend (red fish+ blue fish= purple fish). If they are the same color, a blendable fish will also be that color (red fish + red fish= red fish). overall it is still a surprise at how much the color blends especially if the fish has multiple colors.
Mackerel is a common name applied to a number of species of fish. Since it includes many species, this means they vary in color. But the most common colors are blue, gray, and green.
I believe they are color blind. Most fish are colorblind but it can probably see in balck and white
Some fish will get more pale in color and some will not chand\ge in color
gold fish
When tiger fish get sick, they may change color to appear darker or faded. This change in color can indicate stress or illness in these fish.