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Cartilaginous fish, such as sharks, do not have any of the bones found in the lower jaw of other vertebrates. Instead, their lower jaw is composed of a cartilaginous structure homologous with the Meckel's cartilage of other groups. This also remains a significant element of the jaw in some primitive bony fish, such as sturgeons. [11]
The bluefish is a moderately proportioned fish, with a broad, forked tail. The spiny first dorsal fin is normally folded back in a groove, as are its pectoral fins. Coloration is a grayish blue-green dorsally, fading to white on the lower sides and belly. Its single row of teeth in each jaw is uniform in size, knife-edged, and sharp.
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.
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. It usually plays a role in suspending the jaws and/or operculum (teleostomi only).
The blue-spotted jawfish have an electric-blue spotting over a yellow or orange body with an elegant yellow dorsal fin. They have large eyes that make them look as "alien". [3] The males have stark white in their anterior halves. The females and the non-courting males are dark brown and have larger blue spots.
Chondrichthyes (/ k ɒ n ˈ d r ɪ k θ i iː z /; from Ancient Greek χόνδρος (khóndros) 'cartilage' and ἰχθύς (ikhthús) 'fish') is a class of jawed fish that contains the cartilaginous fish or chondrichthyans, which all have skeletons primarily composed of cartilage.
The fish is maroon, with blue spot that fades to bright red. [3] The color pattern helps it blend in with its natural environment. It grows to up to 24 in (60 cm) long. [4] Most adult have blue mouths, [8] while the young have bright red eyes. [5] The flesh is also blue in color, but turns into white after cooked. [9]
The molars are set in series of four or five on each side of the upper jaw, and in series of three or four on the sides of the lower jaw, becoming smaller in size anteriorly. [11] The body is covered with large scales, which may be cycloid or weakly ctenoid in shape. The head is mostly scale-free, with the exception of parts of the operculum. A ...