Fish

• A father sea catfish keeps the eggs of his young in his mouth until they are ready to hatch. He will not eat until his young are born, which may take several weeks.
  


• An electric eel can produce a shock of up to 650 volts.
  


• Catfish have 100,000 taste buds.
  


• Dolphins sleep at night just below the surface of the water. They frequently rise to the surface for air.
  


• Goldfish lose their color if they are kept in dim light or are placed in a body of running water, such as a stream.
  


• It takes a lobster approximately seven years to grow to be one pound.
  


• Sharks apparently are the only animals that never get sick. As far as is known, they are immune to every known disease including cancer.
  


• The blue whale is the loudest animal on Earth. The call of the blue whale reaches levels up to 188 decibels. This extraordinarily loud whistle can be heard for hundreds of miles underwater.
  


• The giant squid is the largest creature without a backbone. It weighs up to 2.5 tons and grows up to 55 feet long. Each eye is a foot or more in diameter.
  


• The harmless Whale Shark, holds the title of largest fish, with the record being a 59 footer captured in Thailand in 1919.
  


• The largest animal ever seen alive was a 113.5 foot, 170-ton female blue whale.
  


• The largest Great White Shark ever caught measured 37 feet and weighed 24,000 pounds. It was found in a herring weir in New Brunswick in 1930.
  


• The Pacific Giant Octopus, the largest octopus in the world, grows from the size of pea to a 150 pound behemoth potentially 30 feet across in only two years, its entire life-span.
  


• The turbot fish lays approximately 14 million eggs during its lifetime.
  


• The world's largest mammal, the blue whale, weighs 50 tons at birth. Fully grown, it weighs as much as 150 tons.
  


• Unlike most fish, electric eels cannot get enough oxygen from water. Approximately every five minutes, they must surface to breathe, or they will drown. Unlike most fish, they can swim both backwards and forwards.
  


• Whales and dolphins can literally fall half asleep. Their brain hemispheres alternate sleeping, so the animals can continue to surface and breathe.