The Blue Shark (Prionace glauca) is part of the Carcharhinidae family, the order Carcharhiniformes. It can be found in almost all seas and oceans. It has the largest spread of all shark species.
Blue shark is one of the most common species of sharks. The blue shark population is the most dense in temperate and tropical areas.
The blue shark can be found in the literature or in the foreign language and under the names: Karharias (Greek), Blue shark (English), Prionace glauca (Latin).
Currently it is a fish species extinct due to excessive trade and accidental catch. Shark catches amount to 31,000 tonnes a year, of which much blue shark is represented by over 75% of the quantity.
Blue Shark’s Food
The blue shark’s food consists of small species fish, octopus, shrimp, seal pups, crabs or calamari but does not refuse even bigger birds or mammals.
The blue shark feeds almost all the time, but the greatest activity is at night.
They have been observed feeding in groups by collapsing fish beds to allow them to feed more easily. The triangular teeth make the prey not escape.
Blue Shark’s Aspect
The blue shark has a length of 4 meters and a weight of 150-200 kg. It can easily be seen from behind by its slim body with a special color. The blue color is what gives him the name.
The back (dorsal), like all sharks, has the darkest indigo shade, on the sides the color decreases in intensity, and the abdomen is a pale blue whitish.
Characteristic of the blue shark is, in addition to color, the long conic nod and big eyes. The larger caudal swimmer gives it a boost in water. The female’s skin is about three times thicker than that of the male.
If needed, they can move very fast. The largest specimen was 6.1 meters long. The heaviest specimen weighed 391 kg.
Blue Shark’s Behavior
The blue shark is loved for its beauty and shape and for its ease and elegance with which it moves in the water. It has a unique social behavior. Forms shark jokes by size or sex. These unique behaviors could not be explained so far.
It can be found from the surface to the depths of 350 meters. In temperate areas it approaches the shore where it can be seen by divers.
He prefers waters with temperatures of 7 to 16 degrees but tolerates temperatures up to 21 degrees.
It is a migratory and pelagic species that can also be seen off the oceans on the surface of the water. Sometimes it comes out over the water through small jumps. Although more swims relatively slowly sometimes it has the ability to make very fast moves, especially if it is hungry or challenged.
He travels regularly in the Atlantic Ocean. He created a circuit clockwise, starting from the Caribbean Sea, along the coast of America to the coast of Africa and back to the Caribbean Sea.
Small and young individuals are predators of larger shark species such as the big white shark or the tiger shark. The blue shark does not attack man except very rarely. In more than 400 years, more precisely from 1580 until 2013, there were 13 attacks.
Blue Shark’s Reproduction
Blue shark is a shark viviparous species (which gives birth to fully developed babies). The gestation period can take up to 12 months. During reproduction the male bites the female and leaves a scar.
The female can give birth to over 100 little sharks, but the average is 25-35 per birth. Young sharks reach maturity at the age of 5-6 years.
The life expectancy of the blue shark is 20 years.