tural support, a storage organ, or as a transport network within the organism.
             The role of the holdfast is to anchor the seaweed securely to the substrate it lives on. The holdfast must be strong enough to resist the strong pull of the waves and tides on the seaweed. The size and strength of the holdfast varies between species.
             The main heterotrophic organisms of the seashore are the molluscs. The most common molluscs are the gastropods (periw
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