Bonytail

About the Bonytail

The Bonytail is a sleek, cigar-shaped fish with a distinctive, slender caudal peduncle, giving it the 'bonytail' moniker. Its body is typically dark dorsally, fading to silvery sides and a white belly, often with a subtle bluish or purplish sheen. A prominent hump may be present on the back of larger individuals, and its head is relatively small with a terminal mouth, reflecting its feeding habits. Fins are usually dark-edged, adding to its streamlined appearance.

Source: FishBase & iNaturalist

Habitat

This freshwater cyprinid historically thrived in the main channels of large, warm-water rivers, preferring areas with moderate current over rocky or sandy substrates. They were often found in backwaters, eddies, and side channels of the Colorado River basin.

Distribution

Native to the Colorado River basin across Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming, the Bonytail has been extirpated from its Mexican range. Once abundant and widespread, its numbers and distribution have drastically declined due to habitat loss and alteration.

Behaviour

Bonytails are thought to be omnivorous, feeding on a mix of aquatic insects, larvae, algae, and detritus found on the river bottom or suspended in the water column. They are active swimmers, often forming schools and utilizing various river habitats throughout the year. Their elongated body is well-suited for maneuvering in river currents, but specific seasonal movements are largely unknown due to their scarcity.

Lure suggestion

The Bonytail is an extremely rare and federally protected endangered species. Actively targeting this fish is illegal and highly discouraged. If accidentally caught, anglers should immediately identify, handle the fish minimally, and release it unharmed to ensure its survival. Educating yourself on proper identification is paramount to avoid harming this critical species.