American eel side view photo with black background

    American Eel

    Anguilla rostrata
    Chestnut lamprey side view photo with black background

    Chestnut Lamprey

    Ichthyomyzon castaneus
    Illustration of an adult flathead catfish

    Flathead Catfish

    Pylodictis olivaris

See Also

Photo of a three-toed amphiuma in an aquarium.

Three-Toed Amphiuma

Amphiuma tridactylum
Photo of researcher holding a gilled siren

Western Lesser Siren

Siren intermedia nettingi