Lampreys / ˈlæmpreɪz / (sometimes inaccurately called lamprey eels) are a group of jawless fish comprising the order Petromyzontiformes / ˌpɛtroʊmɪˈzɒntɪfɔːrmiːz /, sole order in the class Petromyzontida. The adult lamprey is characterized by a toothed, funnel-like sucking mouth.

The sea lamprey has an eel -like body without paired fins. Its mouth is jawless, round and sucker-like, and as wide or wider than the head; sharp teeth are arranged in many concentric circular rows around a sharp, rasp-like tongue. There are seven branchial or gill …

2024年6月16日 · But the anatomical trait that makes the sea lamprey an efficient killer of lake trout and other bony fishes is its disc-shaped, suction-cup mouth, ringed with sharp, horny teeth, with which it latches on to an unfortunate fish. The lamprey then uses its rough tongue to rasp away the fish's flesh so it can feed on its host's blood and body fluids.

Unlike their hagfish cousins, lampreys have two elongated dorsal fins on their backs, close to their caudal (tail) fin. Their mouths are the epitome of nightmare fuel. They are round, and lined with rows upon rows of sharp, inward-facing teeth.

Because of their snake-like body shapes, sea lampreys are sometimes referred to, albeit erroneously, as eels. The sea lamprey’s defining feature, however, is a jawless, circular mouth disc filled with layered circles of sharp teeth, which it uses to latch onto other marine animals; its outstretched mouth disc can be as wide or wider than its ...

The eel-like, scaleless animals range from about 15 to 100 cm (6 to 40 inches) long. They have well-developed eyes, one or two dorsal fins, a tail fin, a single nostril on top of the head, and seven gill openings on each side of the body.

2025年2月21日 · The most unique feature of the lamprey mouth is its sucking disk combined with the keratinous teeth and the rasping tongue. Unlike most fish, which have jaws and teeth designed for biting and chewing, lampreys have a mouth designed for …

The most impressive feature of a Pacific Lamprey is its large, jawless sucking mouth, which comes complete with several teeth. It uses this suction-cup style mouth to attach itself to rocks in between bursts of swimming.

2025年2月28日 · Lampreys are eel-like fish that belong to the order Petromyzontiformes. Together with hagfish, they constitute the infraphylum Agnatha, a group of jawless fish. They are among the most primitive vertebrates, characterized by a cartilaginous skeleton and a toothed oral disc used for sucking on prey.

Pacific lampreys belong to a primitive group of fishes that are eel-like in form, but lack the jaws and paired fins of true fishes. Pacific lampreys have a round sucker-like mouth, no scales and gill openings. Identification of lampreys depends largely on the number, structure and position of teeth found in adult lamprey.