Darkness stifles reproduction of surface-dwelling fish
There's a reason to be afraid of the dark.
Fish accustomed to living near the light of the water's surface become proverbial "fish out of water" when they move to dark environments like those found in caves, according to a study from North Carolina State University.
In research published this week in Biology Letters, a Royal Society scientific journal, NC State post-doctoral researcher Rüdiger Riesch and colleagues found that Atlantic molly females from regular surface streams have a difficult time adjusting to cavelike conditions. Surface female fish had trouble ...

