Guppies choose their friends wisely, new research suggests. When under threat of sexual harassment from aggressive male fish, female Trinidadian guppies pair with "attractive" females to avoid ...

Sexual harassment is a burden that females of many species face, and some may go to extreme lengths to avoid it. In a new paper from the June issue of the American Naturalist, Darren Croft (University ...

Female-on-female aggression The researchers also tested the aggressive tendencies of the guppies in all-female or in mixed-sex groups in the presence of a harassing male. By adding a food patch to the ...

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 ...

Male guppies that glow with more orange aren’t just fashion-forward — they’re also significantly more sexually active. A UBC study reveals that brighter coloration is linked to virility and is ...

You know how it is: You're minding your own business when up swims a male guppy determined to copulate with you. It's not your fertile time of the month, you're not giving off attractive chemical ...

From our perspective, guppies lead simple lives—eating, reproducing, and, after a couple of years, dying. Apply a little evolutionary pressure, though, and they can evolve larger brains that make them ...

Researchers found that male Trinidadian guppies observe a form of nepotism when it comes to pursuing the opposite sex. These tiny tropical fish often help their brothers in the mating process by ...

Guppies have been a separate species for 500,000 years, and during that time their color has changed drastically. But one thing has stayed the same: an orange patch on males. This is quite possibly ...