Sharks have different food preferences depending on their species. Hammerhead sharks particularly like to eat fish, tiger sharks like to eat turtles, and whale sharks like to eat some plankton. However, fish in the sea and molluscs such as octopus and squid are the common delicacies of most sharks. In fact, the whale shark known as the "King of Sharks" is not ferocious at all. It just gets this title because it is the largest. An adult whale shark can grow to more than 20 meters long and weighs as much as four elephants combined. It can be said to be the largest fish in the world, but its temperament is very docile. What is even more unimaginable is that such a huge animal only feeds on shellfish on the seabed. There is a layer of strange tissue in the mouth of the megamouth shark that can emit light. It often takes advantage of this to open its huge mouth in the depths of the ocean, trapping plankton that yearn for light. Those poor plankton don't know that they are about to become the "meal" of the giant mouth shark.