The dolphins that sound like a chorus of squeaking mice
Close-up footage reveals the underwater world of timid dolphins and their melodic chants that sound like a chorus of squeaking mice.
The shy striped dolphins produced the weird sound while being observed by a stunned whale-watching tour group near Pico Island in the Portuguese Azores.
Striped dolphins are known for being the most illusive of all dolphin species, who normally keep their distance from humans and boats, making this footage particularly rare.
Striped dolphins can grow to up to nine feet long (2.4 metres).
They communicate using click-whistles and pulse sounds using echolocation.
This enables them to track objects in dim or dark water.
Their complex array of whistle sounds also allows the dolphins to talk to one another.
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The Striped Dolphin can be found in the tropical and temperate waters of all of the oceans in the world. This dolphin species was first discovered in 1833 by Meyen. Its Latin name refers to the colours of its flanks, which are dark blue and white.
Source / Image Courtesy
The ever-so shy striped dolphins produced the weird sound while being observed by a whale-watching tour group near Azores, Pico Island.
Shot by underwater videographer, Stefano Ulivi, 42, who was amazed by long and loud ultrasonic sound of the group as they swam away from the boat.
Striped dolphins are known for being the most shy and timid of all dolphin species, scared by both human and boat presence.