We generally think that sharks are very large and they will be very heavy, but this is not the case. There are many species of sharks, including about 500 recorded species, and some undiscovered species. These different species of sharks, not only have a relatively large difference in appearance, their weight is also very different.
For example, some very large sharks, their weight is also very heavy, large sharks can weigh between 20-30 tons. Some of the more common medium-sized sharks, such as wild submarine tiger sharks, may weigh about 5 tons. In addition, some sharks are very small, such as the pygmy dogfish, which is very small by name, and their weight is very light, even less than a pound. In short, the differences between different varieties are very large and can not be generalized.
As mentioned above, there are many kinds of sharks, and the weight of these different kinds of sharks is different. The same is true of their body length, and different species of sharks have very different body lengths. For example, some species of sharks are very large, such as whale sharks. After they reach adulthood, their body length may reach 12 meters, some can reach 18 meters or even more than 20 meters, of course, this kind of big shark is not particularly common. On the contrary, some sharks are very small. For example, the dwarf dogfish mentioned above, its adult body length is only 20-27 centimeters, even smaller than some ordinary fish.
