To eat, female seals only sleep for 1 hour a night

Female elephant seals spend most of the year fishing deep in the Pacific Ocean.

Female northern elephant seals do not have a nine-to-five life.

Jeremy Goldbogen, a marine biologist at Stanford University who was not involved in the study, said, "These advanced technologies provide unprecedented detailed information about when and where the northern elephant seal forages in the deep sea.

The northern elephant seal is a mysterious animal.

In order to figure out how female northern elephant seals survive on small fish that are only 2 cm long, researchers in Japan and the United States installed infrared cameras with depth sensors on the heads of 48 female seals.

Researchers found that female seals hunt in the deep sea area called the "transition zone" and spend 80% to 100% of the time constantly diving for fish.

At the same time, the researchers concluded that male northern elephant seals are large in size and lack diving skills, which means that their hunting time is four times that of females.

Barbara Block, a marine biologist at Stanford University who was not involved in the study, said the work provides "astonishing details" about the lifestyles of these creatures.

Related paper information: org/10.