Swordtails are well-known beginner-friendly, community fish species, compatible with various other fish and environments. They have been bred for many generations, resulting in many different ...

An analysis of the genomes of hybrids of distinct swordtail fish species uncovered a lethal incompatibility between certain combinations of nuclear and mitochondrial genes that encode subunits of ...

Stanford researchers have gained new insights into how the rise of reproductive barriers between organisms creates new species and drives the incredible diversification of life on Earth. One major way ...

When you've got to go, you've got to go -- upstream, that is, if you are a male swordtail fish seeking a mate, according to new research. When you've got to go, you've got to go -- upstream, that is, ...