yes they do, by opening their mouths.
yes
cetologist
Dolphines don't drink at all. They get all the water they need from squid and fish. They actually extract all of the water that they need from their prey.
Killer whales also know as Orca Whales or just Orca are whales belonging to the Oceanic dolphin Family.
Whales drink sea water and also get water from their food. They have special glands that remove most of the salt from the ocean water, making it safe for them to drink.
they go underwater
because
water
They are classified as dolphines because of what they eat (they eat meat), where they live and what they look like.
Dolphins and Whales
Dolphines are mammals which are closely related to whales. They don't breathe like fish, that's why.
All Whales and Dolphins are in the order Cetacea which has three suborders:# Mysticeti - Baleen whales (e.g. Blue Whale, Humpback Whale) # Odontoceti - Toothed whales (e.g. Dolphins, Sperm Whale) # Archaeoceti - Extinct ancestors of whales