[Tyler]

Judging a fish by its color: For female bluefin killifish, love is a yellow mate
16 September 2014, 2:19 pm

Researchers used male replicas of bluefin killifish and controlled their movement with robotic arms to improve repeatability in experiments designed to determine how fertile female fish would respond to male courtship. The surprising result: The females preferred males with yellow fins, contrary to existing research that indicated a preference to blue and red.

Source: Robotics Research News -- ScienceDaily