A search for a fish lost to extinction led to a brand-new species hiding in a South African river.

A study published in the Nature journal alters how the evolution of fish has been historically understood. Fossilized fish and other sea creatures have often been pivotal in new scientific discoveries ...

Researchers identified a new freshwater fish species in South Africa after years of genetic testing and analysis.

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A newly discovered golden cave fish in southwestern China is giving scientists an unprecedented look at evolution in action.

VIENNA, Nov 22 (Reuters) - Industrial-scale fisheries have not only sapped the world's fish stocks but also changed the species' evolutionary course, exacerbating the effect of overfishing by ...

Antarctic notothenioids represent a remarkable evolutionary radiation of fishes that have flourished in the extreme cold of the Southern Ocean. Their unique adaptations — including specialised ...

A comparison of the fast-growing fish-eating Baltic herring (Slåttersill in Swedish) and slow-growing plankton-eating spring- and autumn-spawning Baltic herring. Credit: Leif Andersson/Uppsala ...