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The upper jaw, or maxilla [12] [13] is a fusion of two bones along the palatal fissure that form the upper jaw. This is similar to the mandible (lower jaw), which is also a fusion of two halves at the mandibular symphysis. In bony fish, the maxilla is called the "upper maxilla," with the mandible being the "lower maxilla".
Physically similar to blennies, most jawfish species are small fish (up to 10 cm or 3.9 in) with an elongated body plan. A few species, for example the aptly named giant jawfish (O. rhomaleus), reaches about 0.5 m (1 ft 8 in). Their heads, mouths, and eyes are large in size relative to the rest of their bodies.
The sling-jaw wrasse's most notable feature is that the mouth of this species is armed with highly protrusible jaws which unfold into a tube which is easily half its head length (see below). [2] The males of this species are greyish-brown with orange on the back, a yellowish transverse bar on the flank and a pale grey head which is marked with ...
The teeth are in several series; the upper jaw is not fused to the cranium, and the lower jaw is articulated with the upper. The eyes have a tapetum lucidum. The inner margin of each pelvic fin in the male fish is grooved to constitute a clasper for the transmission of sperm. These fish are widely distributed in tropical and temperate waters. [15]
Lasiognathus, the wolftrap anglerfish, is a genus of deep-sea anglerfish in the family Thaumatichthyidae, with six species known from the Atlantic and Pacific Oceans.. Like its sister genus Thaumatichthys, it is distinct from other anglerfish for an enormous upper jaw with premaxillaries that can be folded down to enclose the much shorter lower jaw. [1]
Brislemouths that consume fish prey are found in individuals ranging from 70 mm to 75 mm. [5] Bristlemouths do not have seasonal trends when it comes to their feeding habits. Bristlemouths are diel vertical migrators , therefore migrating closer to the surface waters in the nighttime in order to find more food. [ 3 ]
The blue-spotted jawfish (Opistognathus rosenblatti) is a species of jawfish native to the Gulf of California.It is an inhabitant of reefs where it is found in large colonies at depths of around 12 metres (39 ft).
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).