Whales and dolphins are mammals, not fish. Scientists think they are as smart as humans! Learn more about these amazing creatures that live in the sea:
• The largest animal on Earth, the blue whale can’t swallow anything larger than a beach ball
• A dolphin can sleep with only half its brain at a time
• Humpback whales talk to each other by singing songs
• The beluga is the only whale that can swim backwards
• Sperm whales eat mostly giant squid.