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The fish's suckermouth, with its fleshy lips, is located in an inferior position at the bottom of its head, as the fish obtains its food from bottom surfaces. [5] The white sucker is often mistaken for different species of suckers and redhorses, but can be distinguished by the complete lateral line system containing 55–85 small scales. [6]
This genus, like other loricariids, is characterized by rows of armour plating covering the body, as well as the underslung suckermouth. They are generally small in size; O. tapirape is the smallest of the species (2.4 cm), while O. flexilis is the biggest (5.5 cm). [1] These species have adaptations that allow them to breathe air.
Phenacobius, the suckermouth minnows, is a genus of cyprinid fishes endemic to the United States. Historically the suckermouth minnow was not found as far eastward as Ohio, now they seem to be a stable species living throughout the Midwest and parts of southern states such as Texas , New Mexico , and Alabama .
The suckermouth minnow inhabits small- to moderate-size streams and rivers with clear to turbid water. They prefer a water temperature of 5–25 degrees Celsius [citation needed] and a mixed sandy gravel substrate. Streams with permanent flow and riffles with little siltation are ideal for this species.
Hypostomus plecostomus, also known as the suckermouth catfish or common pleco, is a tropical freshwater fish belonging to the armored catfish family (Loricariidae), named for the longitudinal rows of armor-like scutes that cover the upper parts of the head and body (the lower surface of head and abdomen is naked soft skin).
In fish, a suckermouth is a ventrally-oriented (inferior) mouth adapted for grazing on algae and small organisms that grow on submerged objects. All Loricariidae possess a suckermouth as do the cypriniform algae eaters of the genus Gyrinocheilus and other genera.
Peckoltia is a basal genus within the tribe Ancistrini of the subfamily Hypostominae. [1] This genus is paraphyletic. [2] At this point, many undescribed species remain. [3] Many of the possibly undescribed species have an identification through the L-number system.
An adult Sacramento sucker representative coloration is a brown or black upperpart and yellow gold or white underpart. At juvenile stage the fish is gray, darker on its dorsal plane, and several spots show on body are present. [5] Other field marks include a conically slender head with a terminally located mouth and medium to large sized lips.