Commensalism is a type of symbiosis . It has small jaws, but can use its tail to corral and even kill fish. It is a very strong swimmer and can even leap out of the water. It lives in tropical and temperate waters, including the eastern and western Atlantic, the central Pacific, and the Indo-west pacific. A consumer is a living thing that eats other living things to survive.
Primary consumers eat producers, secondary consumers eat primary consumers, and so on.
There are always many more primary consumers than secondary consumers, etc. The land masses are hunks of Earth's crust that float on the molten core. The continental shelf is the part of the ocean floor next to each of the continents. An example is the independent development of the wings of Pterodactyls, birds , and bats. The dorsal fin is small and closer to its tail than on most sharks.