Acestrorhynchus falcatus

Acestrorhynchus falcatus is a species of fish in the family Acestrorhynchidae.[2] It was described by Marcus Elieser Bloch in 1794, originally under the genus Salmo.[1] It inhabits the Orinoco and Amazon Rivers in the regions of Suriname, Guyana, and French Guiana. It reaches a maximum total length of 30 cm (12 in), and a maximum weight of 255 g (9.0 oz).[2]

Acestrorhynchus falcatus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Family:	Acestrorhynchidae
Genus:	Acestrorhynchus
Species:	A. falcatus
Binomial name
Acestrorhynchus falcatus (Bloch, 1794)
Synonyms[1]
Salmo pulverulentus Linnaeus, 1758 Salmo falcatus Bloch, 1794 Xiphorhamphus ferox Günther, 1863

Two shell valves that are not equal adhere to one another along the edges to form the ellipsoidal spore body. Each valve has a lengthy tail that is 20.5m in length. On its entire length, a uniform sheath encircled the tail. Three to four spirals of the arctic thread are contained in the 1.2 m polar capsules. A tightly adhering, uniform structural coating covered every surface of the immature and mature spores; it was predominantly thicker at the tails. Piscinoodinium pillulare was the major parasite for A. falcatus.

Acestrorhynchus falcatus feeds on finfish.[3] It is of minor interest to commercial fisheries.[2]