Sharks are the major player in that aquatic ecosystem, but sea snakes, manatee-like dugongs, green and loggerhead turtles, and dolphins also cruise the waters. But it isn't enough just to count the creatures. It's like asking why people cluster in New York, but not in rural Ohio. Heithaus has a working theory. He figures sea life operates much as we do.
People make decisions almost exactly the way that animals do.
For years people have done economic models of how to maximize money-making ability. In animals that often translates into finding food. There's also the risk factor, where sea life again acts like humans. If you've got no money and can barely put food on the table, you're a lot more likely to go out and do something risky. That's simple enough.