Crawl_Ray, Flickr // CC BY-ND 2.0. As stated before, the Blue Glaucus is very popular. We have already protected nearly 4 million square miles of ocean and innumerable sea life - but there is still more to be done. Blue Sea Slug. Commonly known as the blue dragon or blue sea slug, this beautiful little mollusk can be found off the coast of South Africa, Australia and Mozambique, floating on the surface tension of the water. It is a sea slug and its scientific name is the Glaucus Atlanticus. Oceana joined forces with Sailors for the Sea, an ocean conservation organization dedicated to educating and engaging the world’s boating community. They tend to live between a month and a year which is why they are rarely seen. The bright blue color acts as camouflage against the backdrop of ocean waves while the animal’s grayish backside blends with the bright sea surface, concealing it from predators below. Gene flow among Afro-Eurasian and American populations is thus hindered by physical obstructions and water temperatures in the Arctic and Southern Oceans. This fabulous variety of marine gastropod also goes by numerous other names, however. These dragons, also known as blue angels and sea swallows, are technically called Glaucus atlanticus and are simply sea slugs that top out at around an inch long. [5] It can live up to a year under the right conditions. [21] The symptoms that may appear after being stung are nausea, pain, vomiting, acute allergic contact dermatitis, erythema, urticarial papules, potential vesicle formation and post-inflammatory hyperpigmentation.[22]. This Blue Dragon Slug ( nudibranch) has many names: Sea Swallow. It has dark blue stripes on its head. At maturity Blue Glaucus can be up to 3 cm in length. [19] After mating, both individuals are able to lay eggs and can release up to 20 on an egg string, often laying them in wood pieces or carcasses. Before finding Glaucus atlanticus off Andhra Pradesh, these nudibranchs were documented as having been seen in the Bay of Bengal and off the coast of Tamil Nadu, India, over 677 kilometers apart. Also known as the sea swallow, blue angel, blue glaucus, blue dragon, blue sea slug, and blue ocean slug, the Glaucus atlanticus is a small species of "sea slug" (or more correctly and specifically, a nudibranch). Despite its impressive arsenal of defense tactics, the blue glaucus rarely reaches more than 3 centimeters long. It has dark blue stripes on its head. Blue Glaucus. - blue ocean slug Glaucus Atlanticus are marine gastropod mollusks, which means they are soft, 'naked' sea snails but don't use a shell unlike most mollusks. The Blue Dragon Sea Slug has a grey back, which blends in with the ocean bottom as well. The blue dragon’s bizarre appearance is just the beginning. An individual cannot fertilize its own eggs, however, and pairs still must mate. This ability provides the blue glaucus with a defense mechanism against predation. [3] The G. atlanticus species geographical range increased northward by 150 km in the Gulf of California. American Malacological Bulletin, vol. 3. G. atlanticus is able to feed on the Portuguese man o' war due to its immunity to the venomous nematocysts. The Glaucus Atlanticus were discovered by … It has a tapering body which is flattened, and has six appendages which branch out into rayed, finger-like cerata. The radula of this species bears serrated teeth. [8], The radula of this species bears serrated teeth,[9] to which, paired with a strong jaw and denticles allows it to grasp and "chip down" parts of its prey.[6]. This makes people want them as pets. Fjordia (or Flabellina) lineata. Glaucus Atlanticus are up to 3 cm long and weigh between 3-100 grams ; Their heads are blunt with tentacles near the mouth. Sea Swallow Facts First of all, the short and appealing term of Sea Swallow serves as one of several common names for a truly remarkable form of sea slug. The true dorsal surface (carried downwards in G. atlanticus) is completely silver-grey. [6] It is silvery grey on its dorsal side and dark and pale blue ventrally. 145–149. And I bet you thought dragons didn’t exist. Handling the slug could result in a painful, and potentially dangerous, sting. Blue Ocean Slug. Published on Feb 7, 2020 Blue sea dragons, who are also known as blue sea slugs and sea angels, are small marine gastropods that float on the surface of the ocean. Sign up today to get weekly updates and action alerts from Oceana. But what they lack in size, they make up for in ferocity and beauty. The blue dragon is a master of disguise It may seem bright and beguiling once washed up onto a local beach, but when it’s in the water the blue dragon is a master of disguise, using its colours to blend with ocean and sky.