Blue crabs are related to lobsters and shrimps, but their development enables them to walk or run sideways and to burrow as well as swim. When most blue crabs walk or crawl, they have a limping movement. Over-fishing, pollution, and the cost of energy, the prospect is small for increasing the yield of these types of fisheries. True blue crabs are too numerous to mention more than a few important families of crabs. These species of crabs are very important.
Most edible crabs have broad, oval bodies.
The brackish, blue crabs have line patterns with paddle-like feet. These kinds of feet help blue crabs to have a better movement with their feet. Click me to go home.