The sharp-toothed creatures are "very territorial of their nesting grounds," an environmental scientist told Newsweek.

One of the study’s authors named the two new species, Etheostoma kimberlae and Etheostoma michellae, after his daughter, ...

Hidden between the grains, they found two “rare” creatures — and rediscovered a species not seen in 22 years. A team of researchers visited Mae Chaem River in December as part of an “extensive” region ...