Scientists once estimated that there are 654.38+0.5 billion biological species in the world. With the deepening of scientific research, this number has risen to 30 million to 50 million. Tropical rain forest is the region with the richest biodiversity, where more than half of the world's species live. At present, there are about 654.38+0000000 species of living things that have been defined and named on the earth. However, many scholars estimate that there are still 654.38+00000000 species in the world that have not been defined, named or even discovered.
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Thousands of new insect species are reported in various scientific magazines all over the world every year, which shows that our understanding of insects is far from enough. 193 1 year, it was known that there were 80,000 species of butterfly moths. By 1942, people had discovered 10000 new species. Some zoologists speculate that there may be 2 million unknown insects in nature.
Among vertebrates, the research on fish is also insufficient. 1938 A strange big fish was caught by chance off the coast of South Africa. This fish gives off a beautiful blue flame. Fishermen sent the fish to the local museum and made the fish skin into specimens without detailed research.
Later, when experts studied its specimens and skull, they found that the fish was unusual. It not only belongs to a new family independently, but also belongs to a new species. Fish for this purpose have long been considered extinct millions of years ago.
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