Sharks are an apex predators, which means they are at the top of the food chain and they plays an important role in the oceans. They keep the population of the fish and balance for their ecosystem. Sharks keep the population healthy by eating weak, injured and sick fish to prevent the spreading of disease. They are also scavengers. They eat dead fish and mammals or other meat they can get. Scientists considered sharks to be “keystone” species, meaning removing them causes the whole structure to collapse. And if sharks decline in low numbers, commercial fisheries like tuna could be threatened.
Half of the oxygen we need for survival is produced by phytoplankton photosynthesis. Phytoplankton is a tiny marine plants also known as microalgae,
Half of the oxygen we need for survival is produced by phytoplankton photosynthesis. Phytoplankton is a tiny marine plants also known as microalgae,