From Shirlie Sharpe,
Your Guide to Freshwater Aquariums.
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Did you know that....

• The smallest fish is 1/3 inch long freshwater goby.
  
  
• Scientists use ear growth rings to determine a fish's age.
  
  
• Climbing Perch can 'walk' on dry land and even climb trees.
  
  
• Most freshwater eels migrate to saltwater to spawn.
  
  
• Sturgeons live in saltwater but migrate to freshwater to spawn.
  
  
• Lobsters and crayfish eat their own shell after molting.
  
  
• Only 1 in 100 salmon eggs will survive it to adulthood.
  
  
• Goldfish lose their color if kept in dim light.
  
  
• A 400 million year old prehistoric fish species once thought extinct is still living today.
  
  
• Fish sleep with their eyes open.
  
  
• Flapping their fins, Hachetfish can fly out of the water for several feet.
  
  
• In 1984, live fish fell on a London neighborhood after being sucked up in a waterspout.
  
  
• In 1999 a Heron dropped a live goldfish down the chimney of a London family. The fish survived.