Whales are mammals, so they feed milk to their babies and breathe air. Since whales are not fish ,
They must come up to the surface of the water to get air. The air is breathed in and out through their “blowhole,” which is on their back.
Whales are about 20 to 30 meters long, an average blue whale reaches about 31 to 32 meters. The biggest Whale wight 250 tongues. This Whale is as heavy as a big Barge.