What was the first dolphin in the world?

Sometime about 12-15 million years ago, the first Dolphins of the Delphinidae family appeared. Among the first dolphins were Kentriodon and Hadrodelphis, belonging to the Kentriodontidae family and inhabitants of the ocean during the late Oligocene and Miocene.

Are Irrawaddy dolphins extinct?

Not extinctIrrawaddy dolphin / Extinction status

Why are Irrawaddy dolphins important?

The dolphins are an important indicator of the health and sound management of the freshwater resources, and their decline could signal a potentially devastating decline in the health of the entire river ecosystem.

How many Irrawaddy dolphins are left in the world 2022?

92 individuals
The Mekong River Irrawaddy dolphins inhabit a 118-mile stretch of the river between Cambodia and Lao PDR and are scarce—just 92 individuals are estimated to still exist. What is this?

Did dolphins used to walk?

Fossil remains show dolphins and whales were four-footed land animals about 50 million years ago and share the same common ancestor as hippos and deer. Scientists believe they later transitioned to an aquatic lifestyle and their hind limbs disappeared.

Are all dolphins blind?

No, not all species of dolphins are blind. Ocean-going dolphins can see perfectly while certain river-dwelling species of dolphins cannot see perfectly and are completely blind. The Ganges River Dolphin does not have any eyesight.

What animal are almost extinct?

Species Directory

Common name Scientific name Conservation status ↓
Javan Rhino Rhinoceros sondaicus Critically Endangered
Orangutan Pongo abelii, Pongo pygmaeus Critically Endangered
Saola Pseudoryx nghetinhensis Critically Endangered
Sumatran Elephant Elephas maximus sumatranus Critically Endangered

Are dolphins going extinct?

As a result of whaling and other human and natural influences, sixteen species of whales and dolphins are considered to be in danger of extinction according to the Endangered Species Act. Furthermore, because our knowledge about most dolphins and whales is lacking, there may be many more endangered species.