It somewhat depends on the type of whale. The blue whale is very vicious and has practically zero predators. But, typically, most whale may creat wailing sounds to warn others of their presence.
Sharks, killer whales and humans are predators of humpback whales.
Whales slap their tails on the water for communication, to warn predators, or to stun prey. It creates a loud noise that can be heard from far distances, helping them stay connected with their pod or alert others to danger.
Killer whales
Killer whales
Whales have no natural predators.
the cods predators are whales and humans>
A killer whale has no predators.
Orcas or killer whales have no natural predators.
Natural predators of Killer Whales include larger sharks such as Great White Sharks and occasionally larger Killer Whales. However, adult Killer Whales are typically considered apex predators with few natural predators due to their size and strength.
Killer Whales
whales
predators are sharks, whales, octopus, and aliens