Describe the life forms of aquatic ecosystem found in different zones with suitable examples and diagrams

) Biota of Littoral Zone: This zone is the shore region of the marine ecosystems and is subject to violence of waves and tides, fluctuation of water level and variability of temperature, light, salinity and moisture. In common language supra littoral zone is termed as a beach. There are few species of plants present in this zone.

Common animals found here are snails, clams, barnacles, crustaceans, annelids, sea anemones and sea urchin. The animals here exhibit zonation with respect to tides. Animals more resistant to desiccation usually occurring at higher levels than _______ _______ ________ ______ ______ _____ _____ ________ __________ ______ __________ _____.
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