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Apristurus Yangi
''Apristurus yangi'', or Yang's longnose catshark, is a type of deepwater catshark found exclusively in the waters of Papua New Guinea. It is identified from just a single female specimen ever caught in the region mentioned. Description This catshark has several distinguishing characteristics, such as long slender head, very elongated snout, wide mouth, large anal fin, blackish snout tip, and absence of enlarged denticles on the caudal fin. The only specimen ever collected, which is an adult pregnant female, has a maximum total length of 43.7 cm. The egg case is around 6 cm long and has vague longitudinal striations. Distribution and habitat This species is believed to inhabit the Bismarck Archipelago The Bismarck Archipelago (, ) is a group of islands off the northeastern coast of New Guinea in the western Pacific Ocean and is part of the Islands Region of Papua New Guinea. Its area is about . History The first inhabitants of the archipela ..., north-east of Papua New Gu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentanchidae
Pentanchidae, the deepwater catsharks, is a family of sharks belonging to the order Carcharhiniformes Carcharhiniformes ( from Classical Greek ' (karcharos) 'sharp/jagged' and ' (rhinos) 'nose', plus Latin ''forme'' 'shape'), commonly known as ground sharks, are the largest order of sharks, with over 270 species. They include a number of common .... The deepwater catsharks are found in the Atlantic, Indian and Pacific oceans. Genera Pentanchidae contains the following genera: References Carcharhiniformes Shark genera Taxa named by Hugh McCormick Smith {{shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papua New Guinea
Papua New Guinea, officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean north of Australia. It has Indonesia–Papua New Guinea border, a land border with Indonesia to the west and neighbours Australia to the south and the Solomon Islands to the east. Its capital, on its southern coast, is Port Moresby. The country is the world's third largest list of island countries, island country, with an area of . The nation was split in the 1880s between German New Guinea in the North and the Territory of Papua, British Territory of Papua in the South, the latter of which was ceded to Australia in 1902. All of present-day Papua New Guinea came under Australian control following World War I, with the legally distinct Territory of New Guinea being established out of the former German colony as a League of Nations mandate. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish ( Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish ( Chondrichthyes) and jawless fish ( Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caudal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish (Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish (Chondrichthyes) and jawless fish (Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are predominan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bismarck Archipelago
The Bismarck Archipelago (, ) is a group of islands off the northeastern coast of New Guinea in the western Pacific Ocean and is part of the Islands Region of Papua New Guinea. Its area is about . History The first inhabitants of the archipelago arrived around 30,000–40,000 years ago. They may have traveled from New Guinea, by boat across the Bismarck Sea or via a temporary land bridge, created by an uplift in the Earth's crust. Later arrivals included the Lapita people, the direct ancestors of the Austronesian peoples of Polynesia, eastern Micronesia, and Island Melanesia. The first European to visit these islands was Dutch explorer Willem Schouten in 1616. The islands remained unsettled by western Europeans until they were annexed as part of the German protectorate of German New Guinea in 1884. The area was named in honour of the Chancellor Otto von Bismarck. On 13 March 1888, a volcano erupted on Ritter Island causing a megatsunami. Almost the entire volcano fell int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apristurus
''Apristurus'' is a genus of catsharks, the family Pentanchidae, the deepwater catsharks. The species in this genus are commonly known as the ghost or demon catsharks. Species The 41 currently recognized species in this genus are: * '' Apristurus albisoma'' Nakaya & Séret, 1999 (white-bodied catshark) * '' Apristurus ampliceps'' Sasahara, Sato & Nakaya, 2008 (roughskin catshark) * '' Apristurus aphyodes'' Nakaya & Stehmann, 1998 (white ghost catshark) * '' Apristurus australis'' Sato, Nakaya & Yorozu, 2008 (Pinocchio catshark) * '' Apristurus breviventralis'' Kawauchi, Weigmann & Nakaya, 2014 (shortbelly catshark) * '' Apristurus brunneus'' C. H. Gilbert, 1892 (brown catshark) * '' Apristurus bucephalus'' W. T. White, Last & Pogonoski, 2008 (bighead catshark) * '' Apristurus canutus'' S. Springer & Heemstra, 1979 (hoary catshark) * '' Apristurus exsanguis'' Sato, Nakaya & A. L. Stewart, 1999 (flaccid catshark) * '' Apristurus fedorovi'' Dolganov, 1985 (Fedorov's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deep Sea Fish
Deep-sea fish are fish that live in the darkness below the sunlit surface waters, that is below the epipelagic or photic zone of the sea. The lanternfish is, by far, the most common deep-sea fish. Other deep-sea fishes include the flashlight fish, cookiecutter shark, bristlemouths, anglerfish, viperfish, and some species of eelpout. Only about 2% of known marine species inhabit the pelagic environment. This means that they live in the water column as opposed to the benthic organisms that live in or on the sea floor. Deep-sea organisms generally inhabit bathypelagic ( deep) and abyssopelagic ( deep) zones. However, characteristics of deep-sea organisms, such as bioluminescence can be seen in the mesopelagic ( deep) zone as well. The mesopelagic zone is the disphotic zone, meaning light there is minimal but still measurable. The oxygen minimum layer exists somewhere between a depth of depending on the place in the ocean. This area is also where nutrients are most abundant. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
