-Neutral

-Found in Lukewarm,Deep and Cold oceans

-They love hunting Squids They make a noise to echolocate them, which bounces back to them and then, they open up their sharp toothy mouth and ram in to them

-There's a chance that these teeth will fill out while hunting

-They can Break Ice, But when they charge, they may break boats and other kinds of wood

-Rare chance to find a Completely white whale with red pupils that are stronger

-Mother Whales will defend their babies from Orcas

-During Thunderstorms, You may find poor Whales beached on the shore,Push them back into the water without hurting it and will reward you by puking out ambergris

-Trade Ambergris with fishermen and he will give you lots of Emeralds!

-Or you can use it as fuel

-Or you can put iron ingots in a crafting table in the same shape as when you craft a compass, and instead of redstone,you put Ambergris in the middle, and on the top corner slots, put whale teeth and you craft an Echolocator!

-You can use this to find Caves

-If the iron ingots are replaced with Ender Pearls, You can craft the Endolocator!

-This can be use to find the portal room of a stronghold

-If you're Thalassophobic/Megalophobic then you don't want to look in the spoiler to see their sleeping position

(image from wiki)