What type of animal is this? There was a leaking fire hydrant across a sidewalk. On the other side was a lake. The fire hydrant water was streaming across the sidewalk. I saw it swimming in the sidewalk away from the side of the lake to the fire hydrant. What is it?!enter image description here

Likely a dragonfly larva, but I don't know the specific type. They live in water and eat anything they catch like small fish.