Identifying the scaly animal from the Republic of the Congo was “particularly problematic” and led to “long-standing” ...

They are predatory fish and feed on small ... "In the past, different hamlets were thought to be diverse color variants of one species, but today we know that they are individual species.

As one of the most widely consumed fish species, tuna can accumulate high levels of mercury due to its position at the top of the food chain. While tuna is a rich source of protein and omega-3 ...

Two new species of fish were discovered in tributaries ... Their back fins, called the caudal fin, are mostly turquoise, but the fish have sightly different colored bands, per the study.

Researchers checked the well and found several unfamiliar-looking fish inside, the study said. They took a closer look at the animals and quickly realized they’d discovered a new species ...