Stop polluting the waters and building buildings
No, The Chinese dolphin is its own kind. The pink dolphin is a Albino dolphin thus being very pale comming off as a baby pink, and having red eyes.
yes I'm pretty sure that their in danger of becoming extinct :( but there are a few ways we could help them survive and not becoming extinct
They are being hunted and their habitats are being destroyed.
we can set up marine laws to ensure that they are safe.
Because they are being poached/hunted for their Ivory.
they are being hunted for their skin
One thing that is being done to stop Asian elephants from becoming extinct is to enforce stricter laws on poaching. Protecting their habitat is also a way to help them.
Some animals are becoming extinct because they are being hunted or their food is running out. Take pandas fro example, humnas keep taking their bamboo so they are dying of starvation and quickly becoming extinct.
What this means is that the animal is at risk of becoming endangered or extinct.
Evolution
Yes, Pandas are becoming extinct, as a matter of fact, people kill them and maybe even eat them after.