Mammals give live birth to their babies (they do not lay eggs) and they nurse their babies with milk. Both animals you named do that.
killer whale or orca
fish
echolocation
Mammals
A whale
Mammals.
They pilot a plane!
Yes. There all called the blue whale. And also there all the biggest mammals on earth, somebody has just described them as big.
Whales are aquatic mammals, not amphibians.
Um...they're called whales aren't they? All whales are mammals...except for whale sharks, they're sharks (fish). :) beep!
The Blue Whale, the Fin Whale, the Humpback Whale, the Sperm Whale, and so on.
yes gray whales are mammals. They are marine mammals.