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The gar fish has a cylindrical body covered by rhomboidal bony scales that are coated with enamel, making a strong and complete armor.

Gar

The gar fish has a cylindrical body covered by rhomboidal bony scales that are coated with enamel, making…

The sturgeon, although a cartilaginous fish, has externally rows of bony plates. Almost every part of it is used, i.e. caviar from the roe.

Sturgeon

The sturgeon, although a cartilaginous fish, has externally rows of bony plates. Almost every part of…

the sturgeon has a cylindrical body covered by rhomboidal bony scales that are coated with enamel, making a strong and complete armor.

Sturgeon

the sturgeon has a cylindrical body covered by rhomboidal bony scales that are coated with enamel, making…

"These have an elongated body, and a funnel-shaped and protrusible mouth, without teeth, places on the under side of the head" — Goodrich, 1859

Sturgeon

"These have an elongated body, and a funnel-shaped and protrusible mouth, without teeth, places on the…

A genus of ganoid fishes, having five rows of bony shields and four barbels in a transverse row before the small tubeless mouth.

Sturgeon

A genus of ganoid fishes, having five rows of bony shields and four barbels in a transverse row before…

"Sturgeon (Acipenser sturio). Note the elongated snout, the barbules bounding the ventral mouth, the operculum covering the gills, the rows of bony scutes, the markedly heterocercal tail." -Thomson, 1916

Sturgeon

"Sturgeon (Acipenser sturio). Note the elongated snout, the barbules bounding the ventral mouth, the…

Sturgeon is the common name used for some 26 species of fish in the family Acipenseridae, including the genera Acipenser, Huso, Scaphirhynchus and Pseudoscaphirhynchus. One of the oldest families of bony fish in existence, they are native to subtropical, temperate and sub-Arctic rivers, lakes and coastlines of Eurasia and North America. They are distinctive for their elongated bodies, lack of scales, and occasional great size: Sturgeons ranging from 7–12 feet (2-3&frac12 m) in length are common, and some species grow up to 18 feet (5.5 m). Most sturgeons are anadromous bottom-feeders, spawning upstream and feeding in river deltas and estuaries. While some are entirely freshwater, very few venture into the open ocean beyond near coastal areas.

Sturgeon

Sturgeon is the common name used for some 26 species of fish in the family Acipenseridae, including…

Tail of fish. (b) heterocercal tail (Sturgeon)

fish tail

Tail of fish. (b) heterocercal tail (Sturgeon)