I got this shot in the Everglades. The gator was too close for my zoom, so I had to switch to the closeup lens. That let me catch all of the tiny bumps on its face. What are they?
The tiny bumps are pressure sensors that are delicate enough to detect even very tiny changes in pressure. That lets the alligator sense motion in the water, even if it can't see, allowing it to hunt in murky, muddy swamps. That also allows it to watch for prey above the water, while detecting the movement of fish, turtles, etc. under the water at the same time.