Fish at the top of the food chain, like tuna and swordfish, had the most. Then they moved on to more threatening subjects. In the common guppy, ...

Tail smacks are common, as are biting and ramming. “You’ll see these little angry fish swimming over food patches, attacking anything coming over them,” says Heathcote.

While it’s a known fact that female guppies prefer orange and unusual patterns on their male partners, the team found that ...

SAN FRANCISCO — Lions and tigers and bears and… guppies? Don't let its tiny size, delicate tail or fondness for aquarium life fool you; a new chemical analysis places the guppy high up on the ...

Big Brains: What You and (Some) Guppies Have in Common. 5 minute read. A pair of "Metal Yellow Lace" guppies swim in a fish tank at a guppy farm in Singapore on May 22, 2009. Edgar Su / REUTERS.

Guppies make for great starter fish. They're small, measuring less than 2 inches at most on average, and they're fairly hardy fish with relatively low maintenance needs. Plus, with their wide array of ...

SAN FRANCISCO — Lions and tigers and bears and… guppies? Don't let its tiny size, delicate tail or fondness for aquarium life fool you; a new chemical analysis places the guppy high up on the ...

The reason: Fish food. Skip to main content. Open menu Close menu. Live Science. ... In the common guppy, they found some of the highest levels of heavy nitrogen ever recorded.