Iguanapalooza

There were iguanas everywhere. Though they can move quickly enough when they want to, basking on the rocks, draped over and around each other, they don't move a single muscle. It's almost uncanny, as though you're looking at some very strange statuary.

Then one of them sneezes, blinks a few times, and freezes again, back to recharging the batteries. They are the only aquatic lizards in the world; they dive up to 30 feet to feed on algae. Since they're reptiles they have limited ability to stay in cold water, and when they come back on land they're sluggish until their bodies warm up. The "sneezing" is how they expel excess salt from their bodies.