guppies

(Newser) - Frightening fish isn't something you'd find on most people's daily to-do lists, but for researcher Tom Houslay, it was all in a day's work. Per the Washington Post , the evolutionary biologist at the University of Exeter gave his team the task of determining if the fish...

(Newser) - Pretty, colorful guppy guys may get all the ladies, but ugly guppies have “better sperm,” researchers concluded in a recent study. The group watched tropical guppies, and concluded that the colorful men had to “invest” in their beauty at the expense of slowing down their sperm. That's...