The common green swordtail has a brown or red midlateral stripe that extends from the head to the tail. Some fish have two reddish stripes above and below the midlateral band. The swordtail is ...

While humans may be repulsed by it, fish love it. Pair the smell with a bright color, like neon green, and you might not be able to get your pole into the water fast enough to catch the excited fish.

When it comes to mating, dominant green swordtail fish let their tails do the talking. Female green swordtail fish mature faster sexually when they see males with larger-than-usual tails ...

Now researchers from the California Academy of Science (CAS) have discovered a new species of fish that looks pretty hard to miss with its neon green, pink and yellow coloring. The new fish was ...

A new study published in the Proceedings of the National Academy of Sciences this week shows that the melanoma gene can be conserved in swordtail fish because of its beneficial role in sexual ...

The researchers studied a captive population of green swordtail fish, a species native to Central America and popular in tropical aquariums. The green swordtail is named after the striking sword ...