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Why are saltwater fish more colorful than freshwater fish?

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Saltwater fish have a different environment from freshwater fish, so they have different colors to camouflage. Most colorful saltwater fish live on coral reefs, which have a vivid array of colors. Freshwater fish on the other hand often live in streams where they must be dull to blend in with the mud, rocks, sticks, etc. read more

The first thing to consider is that reef fish are not colorful to communicate with humans, but with other fish, thus, it is important to put it in context with fish color vision. For example, we have only 3 receptors but many tropical fish have more, often a 4th receptor for UV light. read more

I believe saltwater fish are more colorful because a lot live in beautiful bright coral reefs, so they must blend in to there environment. Well other saltwater fish use colors for protection, showing off for a mate, hiding, some fish even change color if they get scared, or are about to attack. read more

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Why are saltwater fish more colorful than freshwater fish ...
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