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The researchers looked at the bluehead wrasse, a reef fish that swims in small groups of a dominant blue-headed male and a posse of smaller yellow females.

But bluehead suckers, flannelmouth suckers and speckled dace were at historically low levels.

The Center for Biological Diversity says the designation for the Zuni bluehead sucker ensures that federally permitted actions such as logging, mining and livestock-grazing don’t degrade streams where the fish lives.

The Zuni bluehead sucker was protected under the Endangered Species Act in 2014, a decade after the Center filed a scientific petition to protect the species.