[j-man the skater-man]

i found an insect that looks like a dead leaf. the bug is fully aquatic and seems to lurk at the surface for anything that comes by. i was hoping someone might be able to help identify it. i live in NC about 20 minutes away from the coast. the bug was found in stagnant water and is around 2 inches long. i have seen insects like this before on aquabid being sold as some sort of asian crab or the like.

thanks jason