The average size of the giant squid is 20 to 43 feet long, and between 110 and 660 pounds. Whales and dolphins are mammals, giving birth to live youngsters, just like people. Whales and dolphins communicate with a language of whistles and sonar-like sounds. Recent studies have shown that dolphins are each given distinctive names. Dolphins are sociable, friendly, and very intelligent.
Whales are the largest living creatures on earth, and the the longest living animal on earth.
Recent scientific studies suggest some larger whale species live over 200 years. The killer whale or Orca is actually the largest member of the dolphin family. Dolphins have saved people at sea, and helped sailors since ancient times. There are many species and sizes of sharks , including hammerhead sharks and tiger sharks. Unlike whales and dolphins sharks are a species of fish, whereas whales and dolphins are mammals.