Since they eat clams, fish and decomposing matter on the sea floor, crabs are both carnivores and scavengers. They use their pair of swim paddles, two pairs of antennae and three pairs of walking legs to find food. Crabs can swim, but we usually see them walking on the bottom. Males have bright blue claws and a mark shaped like the Washington Monument on their bellies. Females have red tipped claws and a Capitol shaped mark on their bellies.
Immature females have a triangular marking.
Clams , like other mollusks, have a fleshy extendible foot which they use to burrow in the sand. Once beneath the sand, they stick out their siphons. One draws in water and detrital food while the other sends out waste products. Many different types of clams live in the Bay. Fish Fish like other vertebrates, have a backbone but they breath through gills.