The Hector's dolphin has a population of less than one hundred worldwide, all focused around one island in New Zealand. The group seems relatively stable, but it is not growing either.
The baiji dolphin was a freshwater dolphin and the first to be driven to extinction by humans. This species is thought to have gone extinct in 2006.
Yangzte river dolphin
In December 2006 The Baiji Dolphin (also known as the Yangtze River Dolphin) was considered functionally extinct. In August 2007 they were spotted in China. Dolphin species that is in danger of becoming extinct is the Indus River Dolphin (Pakistan). Less that 600 dolphins are left. The Ganges River Dolphin and the Amazon River Dolphin are considered threatened.
The Chinese river dolphin is an extinct species - A living individual cannot be found in this species anywhere in the world.
Most dolphins are not endangered. However the Chinese river dolphin and a few other dolphin species are endangered. In fact, the Chinese river dolphin might be extinct.
no...
dinosaurs :)
You can't answer this question as bird species are going extinct all the time...
sea turtles
List them in order of usefulness.
The prey species of the river dolphin, such as fish and shrimps, would suddenly boom and dominate the ecosystem as there would be no predator keeping their populations in check. Whatever those prey species feed on would suddenly decrease as there would be more organisms feeding of it. When one species becomes extinct, it can cause other species to also become extinct. However hopefully the ecosystem returns to an equilibrium eventually. Hope this helps!
No they might be endangered but not extinct