To prevent them from getting trapped by tides and beaching themselves.
where did killer whales come from
They are both mammals, so both of them give birth to live young, and have to come up to the surface to breathe
The babies come from the whales behind
Whales are ovoviviparous because they are mammals, because of this their eggs develop inside of their bodies and they give birth to live young.
Three major lagoons in Baja California are the primary destination of the southbound gray whales. These are Scammon's Lagoon, San Ignacio Lagoon, and Magdalena Bay.
If we humans keep hunting and killing the whales then they will be come extinct.
Whales
For the whale meat and various other products that come from whales.
whales have to come up to the surface for air fish don't
Whales live in and come from every ocean. The Pacific, Atlantic, Arctic, and Indian. If you want to know about a specific type of whale then I could tell you, but whales in general are from every ocean.
Whales dive to get food. They come back to the surface to breathe.
They are mammals.