The cichlid fish ... new species more rapidly than any other group of vertebrates. A new study shows that the ease with which these fish can develop a biological innovation (complex teeth ...

including some “canine-like teeth.” Photos show the new species’ vivid eyes and “dense covering of reddish-brown freckles.” The mix of pink, white, and red-brown hues helps the fish ...

Researchers visited the Mekong River estuary near Ho Chi Minh City between 2023 and 2024 to survey a group of fish ... teeth. Photos show the “dark brown” coloring of the new species.