11. The Cleaner Fish

Among the coral reefs of the Indian and the Pacific ocean, the cleaner fish offers its free services. Fish

of all kinds and sizes make use of this free service. The cleaner fish relieves the other fish of the

parasites and their damaged skins. There are more than 40 species of cleaner fish.

The clients of the sea swallow – a four inches long and striped fish – includes the large predators and

eels. They quietly allow the cleaner fish to do its job – even in their wide open mouth – without

swallowing the cleaner fish.