Female guppies with larger brains found to favor more colorful mates
(PHYSorg.com Biology)

(Phys.org)-A team of researchers with members from Sweden and the U.K. has found that female guppies with larger than average brains preferred to mate with males that were more colorful than average compared to smaller brained females. In their paper published in the journal Science Advances, the team describes how they bred guppies to develop larger brains and used them for comparison purposes in specially constructed fish tanks.