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Most fish species with pharyngeal teeth do not have extendable pharyngeal jaws. A particularly notable exception is the highly mobile pharyngeal jaw of the moray eels.These are possibly a response to their inability to swallow as other fishes do by creating a negative pressure in the mouth, perhaps induced by their restricted environmental niche (burrows) or in the air in the intertidal zone. [10]
Monognathus, or onejaw, is the only genus of the family Monognathidae of deep-sea eels.The name comes from the Greek monos meaning "one" and gnathos meaning "jaw", a reference to the large mouth in comparison with the rest of the fish, and also the absence of an upper jaw (maxilla and premaxilla bones are absent).
Moray eel jaw anatomy. In addition to the presence of pharyngeal jaws, morays' mouth openings extend far back into the head, compared to fish which feed using suction. In the action of lunging at prey and biting down, water flows out the posterior side of the mouth opening, reducing waves in front of the eel which would otherwise displace prey.
Ilyophinae eels are caharcterised by having a lower jaw that is shorter than the upper jaw. In most taxa the upper body lacks scales and in some Dysomma species as well as Thermobiotes do not have a pectoral fin. They have depressed, relatively rounded heads with some rather long teeth. [1]
The jaws of the Kidako moray, or moray eels in general, hold a dual-jaw system for feeding. [10] They primarily use the oral jaws to deliver prey into the esophagus with sharp and piercing teeth. The teeth are curved backward and point towards its throat to avoid prey coming back out of its mouth. [ 13 ]
Gymnothorax tile, like any other moray eel, possesses a second set of jaws, called the pharyngeal jaws, to swallow their prey. The Indian mud moray's eyesight is very poor, and instead of using vision, the species rather relies upon a keen sense of smell and vibrations in the water to detect prey or threats.
With more than 120 species, it the most speciose genus of moray eels. ... 1953 (Spot-jaw moray) Gymnothorax margaritophorus Bleeker, 1864 (Blotch-necked moray)
The leopard moray eel, tiger moray eel or dragon moray (Enchelycore pardalis), is a species of moray eel. [ 1 ] The leopard moray eel is widespread throughout the Indo-Pacific oceans from Réunion to the Hawaiian , Line and Society Islands , north to southern Japan , southern Korea , and south to New Caledonia .