Though it's still unknown which behavior came first, the end result is a perfectly adapted fish. "How finely tuned these fish are to this habitat is just amazing," said Blob. 4th of July Sale - 25 ...

When mated with other female betta fish, these females-turned-males produced offspring that looked perfectly healthy. The only notable oddity was that the resulting broods were usually, but not ...

More than 500 species of cichlids (Cichlidae, a family of fish) have evolved there over the past 15,000 years — a relatively short time span for the process of adaptive radiation to occur.

Exactly why this fish has evolved to sit on incredibly long fins appears to be as simple as why anyone would choose to prop themselves up on some kind of stilt-like device – to be taller. By sitting ...

Footage captured by two high-speed cameras shows the fish’s ability in detail The jets of water that archer fish use to shoot down prey are "tuned" to arrive with maximum impact over a range of ...

Ocean pout live in frigid waters from Labrador in Canada to North Carolina and have evolved a blood protein that serves as antifreeze. When you purchase through links on our site, we may earn an ...