Sharks snuggle together to sleep on the ocean floor

The moment the white sharks lay overlapped and slept soundly into the camera lens of a group of divers.

Scuba divers photographed white shark sharks snuggled on the seabed near an underwater cave in Revillagigedo, Mexico, National Geographic said on Monday. Some of them seemed to be moving unsteadily while others were completely motionless. Large groups of about 20 sharks seem to be preoccupied with human presence.

According to experts, the way to sleep on sharks is quite common . Enric Sala explorer said sharks often lay overlapping when sleeping like that, not just Mexico but along the Pacific Ocean. He also saw the same scene in Revillagigedo.

Unlike humans, sharks have a fixed period of inactivity and rest. They didn't really sleep literally, Jay Bradley, manager of the Blue Wonders showroom in the US National Aquarium, said."They don't fall into a state of loss of awareness when they sleep. We still don't fully understand what they do during their rest , " said Bradley.

A common concept about sharks is that they must swim continuously to avoid sinking. Some sharks like white sharks, hammerhead sharks and wide-mouth sharks move while resting to maintain the oxygen-rich water flow through the gills. However, some studies indicate that the spine is the part that promotes shark swimming, not the brain, meaning that they can go through periods of nerve inactivity while still moving along the sea floor.

Many other sharks, such as white fin sharks, sleep by staying in one place . Small breathing holes push water through their gills.

Although gathered in large numbers like in videos, white-fin sharks are not highly social. They often operate alone but rarely divide territory, meaning they are ready to merge in appropriate locations. Caves and cracks are places where sharks can find shelter to avoid larger predators.

These sharks rest in groups throughout the day.

"These sharks rest by swarms throughout the day. They often gather close together under rock ledges or small caves, then split into several groups scouring the reef at night to hunt. together, they often hunted alone instead of cooperating , " said Caitlin Scully, Birch Aquarium spokesman at Scripps Institution of Oceanography.

Sharks often lie in ocean floor areas with strong ocean currents, allowing water to easily flow through them. Recording an intimate moment of sharks is not too dangerous a task. Unlike oceanic white shark, white fin sharks on the reef are relatively harmless to humans due to their gentle nature and small teeth.