Sharks are a kind of fish belonging to the class Chondrichthyes. They have a very long history and have existed on the earth for more than 500 million years. They also have many kinds, including several orders, and there are many classes under the orders. At present, there are more than 500 recorded shark species, and about 440 species can be identified. These different kinds of sharks are very different, their size, appearance characteristics are different. Moreover, their current existence is also different, some are more common, and some species of sharks are very few.
As mentioned above, although there are many species of sharks in general, these sharks are very different. Some are relatively common, some are very rare, and some are even on the verge of extinction. Common shark species are mainly the following categories:
1, Great White Shark: Great White Shark is relatively large. They are very aggressive and their teeth are about 10 centimeters long. Their tails are crescent-shaped, which is more characteristic.
2. Red Tail Shark: The origin of this shark is in Thailand. Although their size is not particularly large, their character is more irritable, and they have a stronger sense of territory.
3. Tiger Shark: The tiger shark is an ornamental shark species that can be raised in a fish tank. Their adult body length is 30-40 centimeters, and their size is relatively small. Their feeding habits are relatively complex, and they do not have too high requirements for oxygen content in water, so their adaptability is better.
4. Whale shark: It is the largest shark species and the largest fish in the world. After adulthood, their body length can even reach 20 meters.
