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Fish are typically, but not always, cold-blooded vertebrate animals that live in water, are usually covered with scales, and equipped with two sets of paired fins and several unpaired fins. Depending on the species, fish live in fresh, brackish or salt water and can be found at all depths including the ocean floor.

Fish are an important food source for humans and they can be harvested from the wild or raised in aquaculture fisheries.

Fish populations are threatened by infectious diseases, overfishing, pollution, and climate disruption.

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Lake Victoria Cichlid

Lake Victoria Cichlids are highly endangered; species are going extinct before they can even be identified.