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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 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]
Osteichthyes (bone-fish) or bony fishes are a taxonomic group of fish that have bone, as opposed to cartilaginous skeletons. The vast majority of fish are osteichthyans, which is an extremely diverse and abundant group consisting of 45 orders, with over 435 families and 28,000 species. [21] It is the largest class of vertebrates in existence today.
Print/export Download as PDF; Printable version; In other projects ... Opistognathus is a genus of fish in the family Opistognathidae found in the Atlantic, ...
Skeletal head of an Amia calva.Hyamandibular marked h, top image, upper right corner. The hyomandibula, commonly referred to as hyomandibular [bone] (Latin: os hyomandibulare, from Greek: hyoeides, "upsilon-shaped" (υ), and Latin: mandibula, "jawbone"), is a set of bones that is found in the hyoid region in most fishes.
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]
The Syngnathidae is a family of fish which includes seahorses, pipefishes, and seadragons (Phycodurus and Phyllopteryx). The name is derived from Ancient Greek: σύν (syn), meaning "together", and γνάθος (gnathos), meaning "jaw". [1] The fused jaw is one of the traits that the entire family have in common. [2]
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