The blue whale is a marine mammal and is the largest animal that ever existed on the planet, with 33 meters long and 180 tons of weight. It is also the loudest animal in the world. They emit low frequency sounds that reach the 188 decibels that can be heard more than 800 miles away. Its main food is krill but also eat small fish and squid.
The killing of blue whales spread quickly, and in 1925, the United States, the United Kingdom and Japan had joined Norway in hunting blue whales, capturing and killing them and processing them in large factory ships. And in 1930, 41 ships killed 28,325 Blue Whales.
While hunting the blue whale was finally banned in 60 years, 350 thousand blue whales were killed. The current world population of blue whales is estimated at three to four thousand, that species is in the lists of endangered species since the '60s.
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Heading: the English subject...choose...we chose the topic endangered species
Whale: that species is in the lists