Alfonsino
| Alfonsino | |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Beryciformes |
| Family: | Berycidae |
| Genus: | Beryx |
| Species: | B. decadactylus |
| Binomial name | |
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Beryx decadactylus (G. Cuvier, 1829) |
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The alfonsino (Beryx decadactylus), also known as the alfonsin, longfinned beryx, red bream, or imperador, is a species of deepwater berycid fish of the order Beryciformes. It can be found in temperate and subtropical ocean waters nearly worldwide, though it is uncommon. It is typically associated with deep-sea corals, and schools are known to form over seamounts. Adults are demersal and search for prey along the ocean floor, primarily fish, cephalopods, and crustaceans. Like other members of its family, it is remarkably long-lived, with individuals reaching ages of up to 69 years, and possibly longer. It can reach sizes of up to 100.0 cm (39.4 in) in length and 2.5 kg (5.5 lb) in weight and is targeted by commercial fisheries. Its low reproductive rate and the time it takes for juveniles to mature make it vulnerable to expanding deep-sea fisheries, but it is listed as Least Concern by the International Union for the Conservation of Nature (IUCN) due to its extensive range.
The first scientific description of the alfonsino was authored in 1829 by Georges Cuvier in the third volume of his 22-volume ichthyology collection, Histoire Naturelle des Poissons, who gave it the name Beryx dodecadactylus. It was renamed B. decadactylus by ichthyologist G. E. Maul in 1990. The etymology of its generic name is unclear, but it likely comes from the Greek name for a fish, but which species it was originally used for remains unknown. It is possible that Beryx originally described a species of parrotfish, or did not describe a fish at all.
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