There is 2 ways that whale population is declining. One is human activity and second is natural. Natural reasons include dying of old age and being eating by other marine animals including other whales. Human activity includes being caught in nets and being killed for their meat.
toothed whales or/ and baleen whales
There are about 3000 killer whales in the world.
Korean people do not hate and hunt whales. It is the japanese who kills whales for food. The chinese are reported to hunt whales on certain occasions.
Fishermen, sharks and all types of whales
The harpooner. I say the people who kill the whales are the people who dont care about its fragile nature
Humans. After whales have already died there are several scavengers that will feed on the carcass, but humans are about the only animal that hunts, kills and eats whales.
Their population number is between 34,000 and 52,000 Humpback Whales.
Their population number is between 18,000 and 30,000 Gray Whales.
Their population number is between 440,000 and 1,370,000 Pilot Whales.
Their population number is between 34,000 and 52,000 Humpback Whales.
Baleen whales, they eat many tons per day.
If you want a specific species then it varies. Some whales population are known but some are not known well. Example, population humpback whales is around 19,000. Whereas minke whales are around 800,000 to 1 million.