There are over 25,000 identified species of fish on the earth, but there may be over 15,000 fish species that have not yet been identified.  

Fish have a specialized sense organ called the lateral line which works much like radar and helps them navigate in dark or murky water.

February 24, 2012 | Categories: From the Gremlin

Fish have a specialized sense organ called the lateral line which works much like radar and helps them navigate in dark or murky water.