As you know, there are branched food chains in nature: plants create organic matter, animals eat it," vegetarians " are eaten by predators, etc. Sharks are at the very end of such chains or nearby. Despite their agility and aggressiveness, sharks are more likely to prey on weak, crippled and sick victims. The elimination of such from reproduction improves the health of the population. So the sharks could be called "nurses of the ocean." Their activity helps not only fish and marine mammals to exist normally. Sharks also feed on shellfish (squid), there are species whose diet consists almost entirely of plankton-tiny crustaceans, larvae. Finding Nemo (2003) By eating some animals, sharks do not allow their population to multiply massively. It supports in the nature of competition. As a result, species diversity is preserved in ecosystems. And environmentalists have long found out: the larger it is, the more resistant the community is to adverse environmental factors...
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