Pass out oyster shells to touch. The first two or three pairs of legs are pinchers. The last pairs are used for swimming. Shrimp are mainly bottom dwellers, living among algae, sea grasses, stones and shells. They help breakdown algae and grasses by consuming bits of detrital fragments.
Oysters are mollusks with two valves, the bottom one being deeper, heavier and cup-shaped.
They feed on plankton and detrital matter, clustering on the bottom. Worms, snails, small fish and sponges may live on oyster shells or hide in crevices between them. Lead the group down to the beach area beside the dock. Place the three buckets on the sand. Walk single file into water, until thigh-deep.