We've seen in our simulations that the more brightly colored a male guppy is, the more likely he will be seen -- and eaten -- by a predator. In a simulation or in the wild, where predators are ...

Summary and Key Points: The Greater Underwater Propulsion Power Program (GUPPY) was launched by the U.S. Navy after World War II to enhance submarine speed, maneuverability, and endurance.

A properly dressed male guppy, with its gaudy blue spots and brilliant splashes of orange, can't help but stand out. But for a fish that spends its life swimming among predators, it seems that ...