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National Geographic Photo Ark

King cobras are the longest of all venomous snakes. As they face a variety of threats stemming from human activities, these snakes are vulnerable to extinction.

A studio portrait of a domestic house cat named Rocket.

Picture of Whitetail Shiners, Cyprinella galactura, at Conservation Fisheries a native stream fish breeding center.

Picture of a federally endangered Fine-rayed Pigtoe ,Fusconaia cuneolus, taken from the Clinch River near Sneedville. The Clinch River has more federally listed aquatic species than any river in North America, yet is threatened by pollution and habitat loss. Coal mining in the watershed now raises the threat even more.

Picture of a Rock Bass, Ambloplites rupestris, at Gavins Point National Fish Hatchery and Aquarium.

Picture of a Rainbow Mussel, Cambarunio iris. Collected on the Little River near Maryville Tennessee. This species is endangered.

Picture of a River Chub, Nocomis micropogon, at the Tennessee Aquarium.

Picture of the endangered Rough Rabbitsfoot mussel, Quadrula cylindrica strigilatta, at Conservation Fisheries.

Picture of a Smallmouth Bass, Micropterus dolomieu, at the Geneo National Fish Hatchery.