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

On Mille Lacs, who’s eating who?

July 5, 2014 | Categories: Fun Stuff,Resources

By Dave Orrick dorrick@pioneerpress.com

No fish species eating dinner in Lake Mille Lacs ordered walleye as more than a side dish last year.

That’s one bit of information — preliminary and full of disclaimers –
emerging more than a year into a study by Minnesota biologists trying to figure out what is ailing the lake’s fabled walleye.