calosoma-amitch:

Eastern Toe-Biter (Benacus griseus) , Newark DE. May 2018. 

One of the largest “true bug” in the United States, the eastern toe-biter is an apex predator of the aquatic invertebrate world. Found in ponds, shallow pools, and even roadside ditches, this predator is a hunter of aquatic insects, snails, and even fish, catching them with their large front legs and piercing their bodies with a syringe-like mouth. The name “toe-biter” is very apt, as anyone might attest to swimming where the bugs are present. 

These guys aren’t dangerous, but their bite is one of the most painful bites of any insect in the US. If one bites you, you will notice. You won’t die, but you’ll notice.