No less spectacular is the Seahorse (hippocampus). Naturally it is not a horse but a fish which originates from the pipefish family. With about 50 species it populates the oceans worldwide and its measurements lie between 1½ and 30 centimetres depending on the type. The Seahorse, the Nautilus and the Starfish are endangered species. The main reason is the threatening destruction of their natural habitat and their popularity as tourist souvenirs.