Mother whales lower their voices, whispering to their babies to avoid being spotted by hunters

The researchers said the mother whales in the Atlantic has lower their "voice" when communicating with their babies to avoid being spotted by predators.

Some adult whales are difficult to hunt in the wild due to their size, but things are simpler for their offspring. Whale hunting is more common, according to the South China Morning Post.

A team of scientists has attached microphones to the Atlantic ocean whale - an endangered species - to hear their cry. There are only about 500 black whales left in the world.

Mother whale swim with her son in the sea.(Photo: AP).

Thanks to the microphone, the scientists found that the mother whale lowered her voice to the baby whale more than when interacting with other adult whales.

Whale mothers are also quite quiet when talking to each other.

Typically, the whale can be heard from a distance of 1km. But when it lowered its voice, this distance shortened to about 100m.

"Such low volumes may make them harder to detect, while mother and baby whales can still communicate , " the study authors wrote in the journal Royal Society Open Letters on October 9.

Whale hunters often rely on sounds made by their prey to determine their position in low-light ocean conditions. By communicating above, the mother whale can limit herself and herd at risk of being detected.