Final answer:
An orca whale is actually a whale, not a shark, dolphin, or fish. It belongs to the group of aquatic mammals called cetaceans. Unlike fish, cetaceans have lungs and breathe air, just like other mammals.
Step-by-step explanation:
An orca whale is actually a whale, not a shark, dolphin, or fish. It belongs to the group of aquatic mammals called cetaceans, which includes dolphins, porpoises, and whales. Unlike fish, cetaceans have lungs and breathe air, just like other mammals.