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

HOW ICE FISHERMEN ARE USING LED’S TO CATCH MORE FISH

February 12, 2015 | Categories: Fun Stuff,Resources

Anglers are constantly searching for the latest difference-maker to help them extract more fish from ice-capped lakes. The new Bio-Lume from Aqua-Vu, a fully submersible, fish-attracting LED light system, is the most recent tool to be adopted by ardent anglers across the northland, leading to rod-bending results.