Which ocean zone has the most abundant primary producers and why

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?

Witch theory suggests all living things are made up of cell or cells