This fully illustrated AIDGAP guide should enable most beginners to put a name to the invertebrates encountered in marine habitats around the British Isles. These communities include a much wider range of animal types than will be encountered in any other habitat. A five minute plankton haul, a walk on the shore at extreme low water, or (better still) a brief dive into the sublittoral, can reveal whole new worlds of animal life. The classification lists, confirmatory notes and references will enable you to dive deeper into these groups if the mood takes you.