Anemonefish live within the stinging tentacles of large sea anemones for protection from predators and are not harmed by the nematocysts. They usually live in pairs within the one anemone for life. There is great variation of colour and shape within coral reef fishes. The parrotfishes, so called because of their modified parrotlike teeth, have a colourful pattern which shows diversity within the family. Some damselfishes, however, can be a single dull colour.
Trumpetfishes have a compressed and elongate body which can grow to some length.
They use this to their advantage by swimming beside larger fish to sneak up on their prey.