Name International: Swordfish, Espadón

Scientific Name: Xiphias Gladius

The swordfish are large highly migratory fish predators, characterized by its peak long and aplanado.Son stylized and have the characteristic of losing all their teeth and flakes in their early adulthood. They range a maximum size of 4.3 m (14 feet) and a weight of 540 kg (1,190 pounds). The record of the International Game Fish Association corresponds to a specimen of 536 kg (1,182 pounds) captured in Chile in 1953. The swordfish is commonly known as "the gladiator" (hence the used its scientific name, gladius), due to the form of your body and to the similarity of their peak with a sword, which uses as a weapon both for attacking their prey, as to defend itself from its natural predators.
The swordfish are distributed around the world in tropical waters, subtropical and temperate, between the 45° north and south about 45°. They tend to concentrate where they are important currents. are in surface waters where the temperature exceeds 15oC, but also can swim and hunt in waters of around 5ºC for short periods owing to special bodies that heat their eyes and brain.
Females are larger than males, which rarely exceed 135 kg (300 pounds). According to studies carried out in the Pacific Northwest, females ripen at the 4 or 5 years old, while males to the 3 or 4 years.
The swordfish is homeotermo, which lets you maintain a temperature 10 or 15ºC higher than in the water in which muebe. The warming of the eyes improves the vision, and subsequently increases the chances of catch a dam. Of the more than 25,000 species of bony fish, only know that some 22 approximately have the ability to maintain the temperature of your body above the water temperature, among which are also billfish, tuna and some species of shark.

(Source: "http://es.wikipedia.org/wiki/Xiphias_gladius")

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