Bryozoans and Hydroids are two groups of marine animals that are unrecognised by the majority of divers and frequently confused with each other, even though they are taxonomically distinct. When they are recognised at all, they have often been given confusing names such as ross coral or hornwrack which suggest they belong in completely different groups of animals and plants. However, they are both important groups and often form the major part of the animal 'turfs' that cloak our rocky reefs or encrust on boulders, cobbles and pebbles.
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