ROMSO Cyprus Knowledge Base

Quillback Sucker (Carpiodes cyprinus)

The quillback sucker, also known as the quill back carpsucker or simply duvet fish, is a type of freshwater fish from the sucker family widely distributed throughout North America. This catostomid species can be distinguished by its laterally compressed body and dorsal fin, whose first rays are extremely long.

Quillbacks are characterized by their distinctive appearance, with a flat body that tapers towards the tail, and a head that is fairly thick but small compared to the rest of the body. The dorsal part of the head is steeply sloped, while the eyes have a diameter of approximately 16% of the length of the head. The snout is quite small and rounded, ending in a suction cup-like mouth with protractile lips.

Quillbacks are primarily found in North America, where they inhabit freshwater environments such as rivers, streams, and lakes. They feed mainly on invertebrates and benthic algae, using their suction cup-like mouth to capture prey from the substrate. Adult quillbacks can grow up to 26 inches (66 cm) in length and weigh between 1-4 pounds (0.5-2 kg), although some individuals have been known to reach lengths of over 40 inches (102 cm) and weigh up to 10 pounds (4.5 kg).

The name "quillback" refers to the species' distinctive dorsal fin, which is characterized by extremely long first rays that give it a unique appearance. This feature has led to various regional names for the species, including "duvet fish," which is thought to have originated from the Chinese practice of wearing their hair in braids, known as "a duvet."

In terms of its biology and ecology, quillbacks are relatively little studied due to their lack of interest among humans. However, research has shown that they can live for up to 40 years or more in captivity, making them one of the longer-lived species within the sucker family.

Quillbacks thrive in temperatures between 18°C (64°F), which is typical of many freshwater environments found throughout North America.