The whale swam beneath the vessel.
The sperm whale was 1,962 feet beneath the surface of water.
The researchers first thought that it was a humpback whale, but later they identified it as sperm whale.
The team said that “The whale circled Hercules several times and gave our cameras the chance to capture some incredible footage of this beautiful creature. Encounters between sperm whales and ROVs are incredibly rare.”
Sperm whales are also known as cachalot, they are endangered species.
Adult sperm whale grows as long as 60 feet, it is the largest toothed predator in the world. The head of the whale is one-third of its body length.
The animal is the loudest species on the planet; it can make calls up to 230 decibels.
It can live up to 60 years old.
Sperm whales are very curious animals which checks on boasts, robotic vehicles.
They were heavily hunted during the Age of Whaling, for the wax-like spermaceti, which was used to fuel lamps and candles and also as a lubricant.
Ambergris, the waste product of the whale is used in perfumes.
Sperm whales are very rare in Louisiana water, and such an encounter is very rare.
The team has recorded the encounter with the sperm whale, one of the members said that event looked fake; another member said that they will receive similar comments from people watching the video.
The whale was so close to ROV, they thought that they have spotted marks on its nose, which might have caused by the propellers of the boat.
EV Nautilus team leader said that the team never expected the encounter with sperm whale.
The researchers are exploring hydrothermal vents in the Gulf of Mexico to understand how life develops in these unusual geological features.