![]() Like other deepwater chondrichthyan species, more information regarding its biology, ecology, and importance in fisheries is required. There are currently no conservation measures in place for this species. This shark apparently inhabits the upper continental slope at a depth of 283–439 m. The Dwarf lanternshark is a bathypelagic species found off the coasts of Colombia and Venezuela, occurring between Barranquilla and Santa Marta, near the Guajira Peninsula, and between the Los Testigos Island and Grenada. Females bear litters of two or three young, each measuring 5.5–6.0 cm (2.2–2.4 in) long. The specimen pictured here was discovered in the Caribbean Sea off the. It's rarely seen and little is known about it, having only been observed a few times off the northern tip of South America at depths between 283439 meters (9281,440 feet). This species is ovoviviparous, with the developing fetuses being sustained by a yolk sac until birth. The smallest shark, a dwarf lantern shark ( Etmopterus perryi ) is smaller than a human hand. Two new dwarf dogsharks (Etmopterus, Squalidae), found off the Caribbean coast of Colombia. Black line stretches along dorsal side of. Dwarf lantern shark Add your observation in Fish Watcher. Ventral side of the body is covered with black markings. Dwarf lantern sharks are dark brown colored. It usually grows 6 inches in length and has 0.5 ounces of weight. some of the ventral black markings are composed of light-producing photophores, while others are composed of pigment-containing chromatophores. Interesting Dwarf lantern shark Facts: Dwarf lantern shark is the smallest shark in the world. This shark is dark brown with a striking and distinctive pattern of black markings on its ventral surface, a continuous or broken, fine black line along the middle of its back. The skin is covered by thin, needle-like dermal denticles. The caudal fin is low, with a moderate lower lobe and a ventral notch near the tip of the upper lobe. The trunk is short with two relatively close, large dorsal fins bearing grooved spines in the front. There are 25-35 tooth rows in the upper jaw and 30-34 tooth rows in the lower jaw. the Dwarf Lantern Shark, Etmopterus perryi, at 17 to 21 cm (78 in) and 15 g (0.5 oz). The eyes are large, with the anterior and posterior corners acute. The world's smallest shark, the 17-cm, 15-g Dwarf Lantern Shark. It has a long, wide, flattened head comprising a fourth to a fifth of its total length. The Dwarf lanternshark appears to reach a maximum size of about 20 cm TL. Female gives birth to 2 to 3 babies after gestation that lasts less than one year.ġ4.Young sharks are 2.2 to 2.4 inches long at birth.Lifespan of dwarf lantern shark is unknown.The Dwarf lanternshark is a little-known species of dogfish shark in the family Etmopteridae, the smallest shark in the world, found in Colombia and Venezuela. Females start to mate when they reach length of 6.1 inches.ġ3.Dwarf lantern sharks have internal fertilization. Males become ready to reproduce when they reach length of 6.3 to 6.9 inches. They possess photophore, organ which emits light, located on the bottom side of the body (on the belly and fins).ġ0.Dwarf lantern shark produces light to attract the prey and to become invisible to the predators that swim below them (glowing belly masks the silhouette of the shark when looking from below).ġ1.Dwarf lantern sharks are often targeted by parasites which shorten the lifespan of these creatures.ġ2.Sexual maturity of dwarf lantern sharks depends on the body length. Its diet consists of miniature crustaceans, called krill.Ĩ.Dwarf lantern shark are named that way because they are small (dwarf) and able to glow in the dark (lantern).ĩ.Like many deep sea creatures, dwarf lantern sharks have bioluminescent properties. There are 20 to 23 rows of teeth in the upper jaw and 30 to 34 rows of teeth in the lower jaw.Ħ.Dwarf lantern shark has 5 small gill slits on the lateral side of the body.Skin of dwarf lantern shark is covered with thin, randomly arranged, V-shaped scales called dermal denticles.ħ.Dwarf lantern shark is a carnivore (meat-eater). Anal fin is absent.ĥ.Teeth of dwarf lantern shark are designed for cutting and slicing. Sharks star in blockbuster movies as blood-seeking villains, but in reality they’re far more fascinating and complicated. Due to life in almost complete darkness, dwarf lantern sharks have large, elongated eyes which facilitate visualization of the surrounding objects.Ĥ.Dwarf lantern shark has short trunk, large dorsal fin covered with grooved spines, and short caudal fin. Black line stretches along dorsal side of the body.ģ.Dwarf lantern sharks have long, flattened head that usually occupies one third of the body. Females are slightly larger than males.Ģ.Dwarf lantern sharks are dark brown colored. 1.Dwarf lantern shark is the smallest shark in the world.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |