Peaceful tanks look great, but they’re not always the most exciting. Some fish bring a lot more drama, and for hobbyists who ...

Researchers have found that chunks of "flipped" DNA can help fish quickly adapt to new habitats and evolve into new species, acting as evolutionary "superchargers." In the face of threats from other ...

Fish viewed digital models with unfamiliar fish faces longer and from a further distance than models with familiar faces, according to a new study. Fish viewed digital models with unfamiliar fish ...

Caring for children can be a tough job, particularly if you are a female cichlid fish, with research showing that male cichlid fish have a propensity to desert their mates, leaving them to then look ...

In social fish like cichlids, status is everything. High-status males are territorial and colorful – they defend territories and reproduce with females. Low-status males, which are less colorful and ...

A certain type of male fish that builds sandcastles to impress females and warn off rivals has provided an important clue about the evolution of new species. Cichlid fish, which live in Lake Malawi, ...

Female convict cichlid fish turned into pessimists when separated from partners. This is an Inside Science story. (Inside Science) -- Being stuck with an unwanted romantic partner is enough to put a ...

Scientists have uncovered evidence of fish mating with species different from their own—a process that can lead to the creation of several new species. For a study published in the journal Nature ...

When animals practice monogamy, we can generally tell right away. After all, couples like to hang out together, whether they’re humans or squirrels or hawks. But one fish keeps its monogamy so ...

A new study that looked at gut length variation between cichlid fish species found that some of the genetic loci for the trait are sex-specific even though males and females of the same species have ...