Image: Fred Hsu
This massive creature is known as the ocean sunfish. It weighs up to 2,200 pounds and can grow to be the size of a small car. The female of the species has the distinction of producing the most eggs of any vertebrate: three-hundred million.
The ocean sunfish eats only jellyfish and is harmless to humans. Among its few predators are orcas, sharks and sea lions. Scientists aren't completely sure why, but the sunfish frequently swims up from its feeding depths and lies flat on the surface.
Check out a video of the ocean sunfish below, and read more about the species in this article.