Fin whales (Balaenoptera physalus) can dive as deep as 470 m (1540 ft).
im not sure what you mean by "blubber whale" since all whales have blubber but sperm whale do dive down very deep to hunt giant squid.
Wherever the water is deep blue
The density increases..
Orcas can dive upto a 1,000 feet (304.8m).
You can get water stones by getting a blue shards.to get the blue shards, you have to get the HM Dive. have to beat the gym leaders in moss-deep to use Dive .You only can use Dive at places on the ocean that look like they have a deep areas.Dark-blue
Blue whales can dive to approximately 350 feet, for up to one hour. A lot deeper than that, see a video of a camera attached to a blue whale, on the related question, it gets down to almost 1000 ft.
Dean's Blue Hole in the Bahamas is 663 ft deep.
Its density increases.
Because of the whale's CO2 tolerant blood and because of lactic acid fermentation, whales (like the sperm whale) are able to dive down deep to eat deep sea squid and fish. Scource: I'm learning this at one of the best high schools in the USA
The Sperm Whale, noted for being able to dive very deep, actively hunt octopus and squid.
it is simple it is the spram whale