Eurypanopeus depressus is a mud crab in the family Panopeidae (superfamily: Xanthoidea) that inhabits oyster reefs in temperate, subtropical, and tropical oceans. The depressed mud crab is small with an oval and flattened carapace. The carapace has four lateral teeth on both sides and mottled grayish olive or dark olive brown in color. There are two dark brown chelipeds (claws), one large and one small. Underneath, the legs and body are light colored (Williams 1984).E. depressus seeks refuge from direct sunlight during low tide as well as from predators hiding in the clusters and valves of Crassostrea virginica and are sometimes found on the mud surface (Grant and McDonald 1979, McDonald 1982, Meyer 1994).