Yes Whales do have their own prey.
They eat...
Only Killer Whales (Orcas) prey on gray whales.
Whales use sonar. Also note that not all whales need to locate prey. The largest whales are filter feeders; they just filter out whatever is in the water that surrounds them, and eat it. There is nothing to locate. But sperm whales (for example) do hunt for their prey.
no, in fact, they prey on fish, and each other too!
seals or sealions
They chase after its pray.
they bite it
They are predators.
leopard seals preys on them and their prey is fish.
Beluga whales prey is octopus,squid,crabs,snails,sandworms,and fishes like capelin,cod,herring,smealt,and flounder.
toothed whales or/ and baleen whales
Killer Whales prey on Grey whales, which are quite big.
They get along with other whales, in order to get more prey.