Because they can't see and don't know if a shark is around.
the RED SEA but the blind dolphin is endangered sadly
The dolphin species in danger of extinction are the Indus river dolphin, which is a blind dolphin very small which live in the main river of Pakistan, the Indus. There are less than 600 dolphins left of this species.
The Ganges river dolphin. Also known as the blind dolphin!
The Indus blind dolphin, also known as the Indus river dolphin, is primarily found in the freshwater rivers of the Indus River system in Pakistan. Its range extends from the Indus River in the Punjab region to the downstream areas in Sindh. This species is adapted to life in murky waters and is known for its unique echolocation abilities, allowing it to navigate and hunt in its environment. Conservation efforts are ongoing to protect this endangered species from habitat degradation and other threats.
Pink river dolphin
The Atlantic bottlenosed dolphin is far from an endangered species. The animal is the most common dolphin species in the Atlantic.
While dolphins can hold their breath for a long time, they need to find the surface when their oxygen runs out, and finding food is almost impossible.
The orca is the largest dolphin species.
The Ganges River Dolphin is blind not because of pollution but mainly because this species of fresh water dolphins don't have lens but oddly enough use their eyes to locate them selves. For more information about their physical descriptions and biography, go to this link: http://wwf.panda.org/what_we_do/endangered_species/cetaceans/about/river_dolphins/ganges_river_dolphin/
There are a variety of fish and even a species of river dolphin that live in the River Ganges. This river also is the home of a very rare freshwater shark.
no, they are two different dolphin species
Atlantic bottlenose dolphin Bottlenose Dolphins are the most common species of dolphin. Of course, they are the most recognizable and popular dolphin as well. Bottlenose dolphins are likely the dolphin you think of when your hear the word "dolphin".