Sharks lay eggs, but most species are kept in the mother’s body until they hatch. In some other species the eggs are usually clumped together and attached to a firm and discreet place. Some sharks are very loyal to their mates, having only one mate for life. If one of the pair dies, the other will not mate with any other shark or will spawn asexually to continue the breeding mission.
Sharks’ asexual reproduction reduces genetic diversity, which helps them defend against threats from other species. This may have contributed to the decline in numbers, leading to the shark’s extinction.
Perfect sense of smell and good eyesight, plus the ability to sense the electric fields of the animals assigned the king of the seas. With this sense, a shark can detect the smell of prey blood, or urine, for miles away. Therefore, many people think that if they bleed, they should not swim or surf because they were afraid of being attacked. But it is due to the shark’s good sense of smell that it easily distinguishes human blood from wild prey, so it cannot be confused and will not attack because sharks do not consider humans as prey. Most attacks are caused by sharks mistaking the surfers or swimmers at sea for seals or sea cows.