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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 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".
Print/export Download as PDF; Printable version; In other projects ... Opistognathus is a genus of fish in the family Opistognathidae found in the Atlantic, ...
Pharyngeal teeth are teeth in the pharyngeal arch of the throat of cyprinids, suckers, and a number of other fish species otherwise lacking teeth. [ 1 ] Many popular aquarium fish such as goldfish and loaches have these structures.
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]
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).
Yellowhead jawfish have two different types of responses to intruders, flight or fight. The type of response depends on the type of incoming fish. During flight, the fish will swim away from the intruder and in go into their burrow, covering the opening with a large rock. During fight, the fish will spit sand or rocks at the intruder. [4]
The adult fish have an elongated snout-like face with a protruding jaw, while the larvae have a rounder shaped mouth and a lower jaw that does not protrude. [ 8 ] Additionally, members of this family have a unique head joint that contribute to its ability to open its 'loosejaw' so wide.
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