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MAKO SHARK (ISURUS OXYRINCHUS)

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Mako shark is a hydrodynamic shark (it means that it has a conical, pointed snout that breaks tides while it swims), similar to the shape of a torpedo. Its figure, its powerful muscular mass, its caudal fin, and even its ability to stabilize its body temperature, are factors that allow the Mako shark to swim at high speed in the ocean; this shark can reach speeds above 110km/h which makes it the fastest animal in the ocean. 

It is possible that because of its ability to stabilize its own temperature (endothermic), this shark can live in temperate environments and in tropical waters. The Mako shark diet is mainly comprised of tuna and weevils, although it also feeds on marine mammals, turtles, cephalopods (octopus, squid, among others) and even other sharks. 

It has a reproduction viviparous aplacental, reproductive mode in which the embryos develop within the mother and feed from unfertilized eggs (oophagy), and when they are fully developed are expelled. 

It is also classified as “Vulnerable” by the International Union for the Preservation of nature, implying that it is likely to become an endangered species. 

Picture: Eduardo López Negrete

ART IN BLUE WORLD FOUNDATION

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During the last week of August, Blue World Foundation continued to work with the youth of El Quetzalito. In this activity young people learned practical strategies based on critical thinking to exploit their creativity. 

They learned how to make portraits, and through the interviews they made, they designed a small comic book using script narration techniques, drawing and painting. 

It is in this way, young people of El Quetzalito developed their artistic skills to transmit messages about the care of the environment in a different way. 

Art is fundamental to the development of critical thinking in young people and also gives mechanisms to learn to express their thoughts in a different way and integrate new knowledge as they are inspired to make art. Blue World Foundation believes in it, totally.

SHARK MAKO PRIETO (ISURUS PAUCUS)

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With a slightly larger size than the Mako shark, Mako Prieto is an imposing shark with hydrodynamic features, its pectoral fins are long and have a slightly pointed and dark snout. 

Its habitat is still little known to researchers, although there are indications that it is epipelagic (describes of all marine species that live in oceanic areas between the surface and 200m deep). It is classified as viviparous aplacental because the offspring break the eggs inside the mother’s body and feed on the nutrients transmitted by it; before its birth, the offspring of the shark carry out the so-called intrauterine cannibalism or oophagy, which is only the action in which the most developed embryos in the mother’s womb feed on the eggs produced by the maternal ovary while these still are in gestation. 

The International Union for the Preservation of nature has classified Mako-Prieto shark as “Vulnerable” as a precautionary measure, partly because of many aspects that are still unknown to the species. 

Picture: Discovery Communications

CAT SHARK (GINGLYMOSTOMA CIRRATUM)

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This shark receives its common name because of its bulbous head, small snout and a pair of small beards that it has on each side, very similar to the whiskers of a cat. On the dorsal part, this shark may have a gray or brown coloration depending on its maturity, while in the belly area the coloration is pale in all specimens. 

This species is predominantly demersal (it lives in the sandy and rocky bottoms) and is found at depths ranging between 1m and 75mm. 

The diet of the Cat sharks consists of small fish, mollusks (octopus, squid, clams), crustaceans, etc. 

Despite being a species of shark quite common in several places, scientific studies on this species are scarce, which has resulted in a “data deficient” classification by the International Union for the Preservation of nature. 

Picture: Andy Murch

SILKY SHARK (FALCIFORMIS SHARK)

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The silky shark acquires its common name because of the softness of its skin. Other notable features are a moderately long, pointed snout, large eyes, and a regular, non-prominent dorsal fin. It’s a kind of coastal, pelagic habits. As for their diet, this shark feeds mainly on Tuna, Mackerel, Las Lisas and Squid. 

Like other species of sharks, their reproduction is viviparous, which means that the embryos feed through the placenta. As for its classification, the International Union for the Preservation of nature has classified them as “almost threatened” which at the global level implies an indication of instability of the populations of this particular species. 

Picture: Alan C. Egan

GREAT HAMMERHEAD SHARK (SPHYRNA)

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The great hammerhead shark differs from the other species of hammerhead sharks by having an almost straight head with a cleft in the middle and, that the first dorsal fin is very large, characteristic very particular of this species. 

It lives in the warm and tropical coastal regions of most of the world and feeds on fish, crustaceans and cephalopods from their specific regions. The great hammerhead shark is a viviparous species, a reproductive mode in which the embryos, through the placenta, are fed by the mother until the moment of birth. 

Remember that one of the most notable features of hammerhead sharks is to have a vision of 360 ° (peripheral), so the shark can see what happens in all around, taking advantage of this ability to hunt their prey.

Like the other species of hammerhead sharks, the International Union for the Preservation of Nature classifies the great hammerhead shark as “endangered”. 

Picture: Simon Rogerson

GULPER SHARK (GULPER GRANULOSUS)

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Gulper shark is a species that inhabits the slopes of the continental coasts of different regions of the planet, being found from 50m to the 1440m of depth. Although it is true that it can inhabit from 50m deep sea, this shark is rarely seen at depths less than 200 m. 

Its most notable characteristics are very large and green eyes, a grey/brown coloration in the dorsal and clear part of the ventral area, and thorns in the dorsal fins. Also, your skin is covered with mucus. As for its diet, it feeds on: small bony fish, squid and crustaceans. Its type of reproduction is Ovoviviparous which means that the eggs are incubated inside the mother’s body, after that, the mother lays the eggs, and already outside the mother’s body the offspring are born. 

The Gulper shark is classified as “data deficient” by the International Union for the Preservation of nature and as for its preservation is considered a species vulnerable to the effects of the trawl fishery. 

Picture: Andy Murch

WHITE SADDLED CATSHARK (SCYLIORHINUS HESPERIUS)

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The White saddled Catshark is characterized as a small-sized shark. As for its coloration it presents a pattern of dark and clear spots along its body as well as white dots. 

This shark is considered a kind of depth and inhabits the continental shelf at depths from 274m to the 457m. The type of reproduction is unknown, but the hypothesis is that they are oviparous. Because of the difficulty in accessing this specimen, abundance is also unknown, so the International Union for the preservation of nature cannot define its state of preservation. 

Picture: Andy Murch

HAMMERHEAD SHARK (SPHYRNA LEWINI)

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In hammerhead sharks, the head has a particular “T” shape, from the resemblance to a hammer, where the origin of its name comes from. For a long time the shape of his head has been the object of intrigue and study by the scientific community who have established different theories around this unique shark. 

With an excellent vision to recognize the depth, hammerhead sharks can see with great precision what happens to their surroundings, this being one of its greatest characteristics for the search of food. Their diet is mainly constituted of small fishes, crustaceans (like shrimps, lobsters, barnacles, etc.) and rays. 

Regularly, this species lives on the coasts and in the open sea. In addition, it is currently classified as: “Endangered” by the International Union for the Preservation of nature, hence the urgency to promote its preservation. 

Photo: Simon Rogerson