swordfish

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swordfish,

large food and game fish, Xiphias gladius, of the warmer Atlantic and Pacific waters. It is named for its sharp, broad, elongated upper jaw, which it uses to flail and injure its prey of smaller fish. Swordfish breed as far north as Nova Scotia; they are often seen basking on the water's surface, and their fins are sometimes mistaken for those of sharks. They may reach 15 ft (457 cm) and 1,000 lb (450 kg); however, specimens half this size are considered large. Swordfish were formerly harpooned commercially but now are taken using long lines with multiple baited hooks. Conservation efforts are underway to rebuild depleted stocks. Swordfish are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Actinopterygii, order Perciformes, family Xiphiidae.

Swordfish

 

(Xiphias gladius), the only modern representative of the family Xiphiidae of the order Perciformes. The upper jaw is extended into a swordlike projection. There are no ventral fins. The naked body is up to 4 m long and weighs up to half a ton. The swordfish is found in all oceans, primarily in the tropics; it is also encountered in arctic latitudes in the north. In the USSR the fish is found in the Black, Baltic, and Barents seas, as well as in the Sea of Japan and the Sea of Azov. Swordfish generally are solitary animals. Mating occurs in the warm season; the roe are pelagic. Swordfish feed on nektons, including squids, tuna, and sharks. They are commercially valuable.

Swordfish

[′sȯrd‚fish]
(astronomy)

swordfish

a large scombroid fish, Xiphias gladius, with a very long upper jaw: valued as a food and game fish: family Xiphiidae
References in periodicals archive ?
Por otra parte, el tamano de las vertebras de Xiphias gladius e Istiophoridae (Figura 4), las cuales superan los 50 mm de longitud, indicaria que estos especimenes tendrian un tamano importante, superando posiblemente los tres metros de longitud.
Sexual maturity, sex ratio, and size composition of swordfish, Xiphias gladius, caught by the Hawaii-based pelagic longline fishery.
Feeding ecology of broadbill swordfish, Xiphias gladius, off eastern Australia in relation to physical and environmental variables.
Southern stingray Dasyatis americana Wahoo Acanthocybium solandri Swordfish Xiphias gladius Combined Species Gulf 1995 Gulf 1996 (# captured) n = 82 n = 86 n = 269 Roughtail stingray Dasyatis centroura .
15% Tiburones 15% Coryphaena Hippurus 18% Xiphias gladius 28% Nota: Tabla derivada de grafico segmentado.
Sex-specific yield per recruit and spawning stock biomass per recruit for the swordfish, Xiphias gladius, in the waters around Taiwan.
The average catch composition by weight was: 2,589 t yellowfin tuna, Thunnus albacares (about 43% of the total by weight), 557 t bigeye tuna, Thunnus obesus (9%), 1,453 t albacore, Thunnus alalunga (24%), 699 t swordfish, Xiphias gladius (11.