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Daggertooth
The daggertooths (genus ''Anotopterus'') are a genus of marine mesopelagic fish in the order Aulopiformes, the sole genus of the family Anotopteridae. They are found in oceans worldwide, but prefer cooler waters. Description Daggertooths are not similar in appearance to the related lancetfishes and barracudina. They are elongate, silvery, predatory marine fishes that lack scales and have sharp teeth likely used for hunting fishes. However, as their scientific name (meaning "without fins on its back") suggests, they lack dorsal fins which easily differentiates them from their close allies, especially the similar-looking lancetfishes. Another feature that distinguishes daggertooths from lancetfishes is the placement of the large, fang-like teeth. In lancetfishes, the fangs appear on both the upper and lower jaws while in daggertooths the fangs are only seen along the upper jaw. Whether the fangs or the distinctly protruding mandible inspired the common name "daggertooth" remains unc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anotopterus Sp
The daggertooths (genus ''Anotopterus'') are a genus of marine mesopelagic fish in the order Aulopiformes, the sole genus of the family Anotopteridae. They are found in oceans worldwide, but prefer cooler waters. Description Daggertooths are not similar in appearance to the related lancetfishes and barracudina. They are elongate, silvery, predatory marine fishes that lack scales and have sharp teeth likely used for hunting fishes. However, as their scientific name (meaning "without fins on its back") suggests, they lack dorsal fins which easily differentiates them from their close allies, especially the similar-looking lancetfishes. Another feature that distinguishes daggertooths from lancetfishes is the placement of the large, fang-like teeth. In lancetfishes, the fangs appear on both the upper and lower jaws while in daggertooths the fangs are only seen along the upper jaw. Whether the fangs or the distinctly protruding mandible inspired the common name "daggertooth" remains unc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anotopteridae
The daggertooths (genus ''Anotopterus'') are a genus of marine mesopelagic fish in the order Aulopiformes, the sole genus of the family Anotopteridae. They are found in oceans worldwide, but prefer cooler waters. Description Daggertooths are not similar in appearance to the related lancetfishes and barracudina. They are elongate, silvery, predatory marine fishes that lack scales and have sharp teeth likely used for hunting fishes. However, as their scientific name (meaning "without fins on its back") suggests, they lack dorsal fins which easily differentiates them from their close allies, especially the similar-looking lancetfishes. Another feature that distinguishes daggertooths from lancetfishes is the placement of the large, fang-like teeth. In lancetfishes, the fangs appear on both the upper and lower jaws while in daggertooths the fangs are only seen along the upper jaw. Whether the fangs or the distinctly protruding mandible inspired the common name "daggertooth" remains unc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anotopterus Pharao PC14-04 Sta11 IMG 6599
The daggertooths (genus ''Anotopterus'') are a genus of marine mesopelagic fish in the order Aulopiformes, the sole genus of the family Anotopteridae. They are found in oceans worldwide, but prefer cooler waters. Description Daggertooths are not similar in appearance to the related lancetfishes and barracudina. They are elongate, silvery, predatory marine fishes that lack scales and have sharp teeth likely used for hunting fishes. However, as their scientific name (meaning "without fins on its back") suggests, they lack dorsal fins which easily differentiates them from their close allies, especially the similar-looking lancetfishes. Another feature that distinguishes daggertooths from lancetfishes is the placement of the large, fang-like teeth. In lancetfishes, the fangs appear on both the upper and lower jaws while in daggertooths the fangs are only seen along the upper jaw. Whether the fangs or the distinctly protruding mandible inspired the common name "daggertooth" remains unc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anotopterus Pharao PC14-04 Sta11 IMG 6600
The daggertooths (genus ''Anotopterus'') are a genus of marine mesopelagic fish in the order Aulopiformes, the sole genus of the family Anotopteridae. They are found in oceans worldwide, but prefer cooler waters. Description Daggertooths are not similar in appearance to the related lancetfishes and barracudina. They are elongate, silvery, predatory marine fishes that lack scales and have sharp teeth likely used for hunting fishes. However, as their scientific name (meaning "without fins on its back") suggests, they lack dorsal fins which easily differentiates them from their close allies, especially the similar-looking lancetfishes. Another feature that distinguishes daggertooths from lancetfishes is the placement of the large, fang-like teeth. In lancetfishes, the fangs appear on both the upper and lower jaws while in daggertooths the fangs are only seen along the upper jaw. Whether the fangs or the distinctly protruding mandible inspired the common name "daggertooth" remains unc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anotopterus Pharao
The daggertooth (''Anotopterus pharao'', meaning "without fins on its back, of the Pharaoh") is a species of daggertooth. Its distribution includes the North Atlantic Ocean and west of Africa. The record size for this species is 96 cm and was hermaphroditic. Daggertooths are occasionally found dead in bottom trawls used for firefly squid or shrimp. They are similar to needlefish or gars. However, they are distinct. Netted daggertooth specimens are rarely identifiable, mostly because of their soft bodies, which are easily torn or flattened. This is typical of benthic animals of the deep ocean, like some transparent squids. In fact, the bodies are so soft, when pushed against the back of a trawl net, they often die because their organs are crushed and they rip. The habitat of the daggertooth is the open abyss, where few obstacles occur with which to come into physical contact. References ''Anotopterus pharao''at Fishbase FishBase is a global species database of fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesopelagic Fish
Pelagic fish live in the pelagic zone of ocean or lake waters—being neither close to the bottom nor near the shore—in contrast with demersal fish that do live on or near the bottom, and reef fish that are associated with coral reefs. The marine pelagic environment is the largest aquatic habitat on Earth, occupying 1,370 million cubic kilometres (330 million cubic miles), and is the habitat for 11% of known fish species. The oceans have a mean depth of . About 98% of the total water volume is below , and 75% is below .#Moyle, Moyle and Cech, p. 585 Marine pelagic fish can be divided into coastal (inshore) fish and oceanic (offshore) fish. Coastal fish#Coastal pelagic fish, Coastal pelagic fish inhabit the relatively shallow and sunlit waters above the continental shelf, while #Oceanic fish, oceanic pelagic fish inhabit the vast and deep waters beyond the continental shelf (even though they also may swim inshore). Pelagic fish range in size from small coastal forage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aulopiformes
Aulopiformes is a diverse order of marine ray-finned fish consisting of some 15 extant and several prehistoric families with about 45 genera and over 230 species. The common names grinners, lizardfishes and allies, or aulopiforms are sometimes used for this group. The scientific name means "''Aulopus''-shaped", from ''Aulopus'' (the type genus) + the standard fish order suffix "-formes". It ultimately derives from Ancient Greek ''aulós'' (αὐλός, "flute" or "pipe") + Latin ''forma'' ("external form"), the former in reference to the elongated shape of many aulopiforms.FishBase (2000) They are grouped together because of common features in the structure of their gill arches. Indeed, many authors have considered them so distinct as to warrant separation in a monotypic superorder of the Teleostei, under the name Cyclosquamata. However, monotypic taxa are generally avoided by modern taxonomists if not necessary, and in this case a distinct superorder seems indeed unwarra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anotopterus Nikparini
''Anotopterus nikparini'' is a species of fish in the family Anotopteridae, the daggertooths. It is native to the northern Pacific Ocean, where it occurs as far north as the Bering Sea and as far south as Japan and Baja California.Froese, R. and D. Pauly, Editors''Anotopterus nikparini''.FishBase. 2015. This fish can be found near the surface to depths below 2000 meters. Populations in colder regions are mainly larger, older adults. This species feeds on molluscs, crustaceans, marine worms, salps, and fish. It is an important predator of Pacific salmon.Nagasawa, K., Azumaya, T., & Yoshida, Y. (2002)Impact of predation by salmon sharks (''Lamna ditropis'') and daggertooth (''Anotopterus nikparini'') on Pacific salmon (''Oncorhynchus'' spp.) stocks in the North Pacific Ocean.NPAFC Technical Report No. 4. In turn, it is a prey item for whales and large fish such as albacore, lancetfish, halibut, steelhead, pomfret, and blue shark The blue shark (''Prionace glauca''), also known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anotopterus Vorax
Anotopteridae
Fish described in 1913
{{Aulopiformes-stub ...
''Anotopterus vorax'', the south ocean daggertooth, is a species of daggertooth. ''A. vorax'' inhabits the South Pacific, South Atlantic, South Indian Ocean, and Antarctic Ocean. References ''Anotopterus vorax''at Fishbase FishBase is a global species database of fish species (specifically finfish). It is the largest and most extensively accessed online database on adult finfish on the web. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barracudina
Barracudinas are any member of the marine mesopelagic fish family (biology), family Paralepididae: 50 or so extant species are found almost worldwide in deep waters. Several genera are known only from fossils dating back to the Ypresian epoch. The generic term, generic name ''Paralepis'' (for which the family is named) is from Greek language, Greek - ''para'' meaning "somewhat", ' meaning "scaled". Description Barracudinas are elongated, slender fish with large eyes, and a pointed snout containing fang-like teeth. This gives them some superficial resemblance to barracudas (family Sphyraenidae), although the two groups are not closely related. Barracudinas are actually related to lizardfish (order Aulopiformes; suborder Alepisauroidei) and are most closely aligned with lancetfish (family Alepisauridae), hammerjaws (family Omosudidae) and daggertooths (family Anotopteridae). Like their close relatives, barracudinas lack swim bladders and are simultaneous hermaphrodites, a repro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paralepididae
Barracudinas are any member of the marine mesopelagic fish family Paralepididae: 50 or so extant species are found almost worldwide in deep waters. Several genera are known only from fossils dating back to the Ypresian epoch. The generic name ''Paralepis'' (for which the family is named) is from Greek - ''para'' meaning "somewhat", ' meaning "scaled". Description Barracudinas are elongated, slender fish with large eyes, and a pointed snout containing fang-like teeth. This gives them some superficial resemblance to barracudas (family Sphyraenidae), although the two groups are not closely related. Barracudinas are actually related to lizardfish (order Aulopiformes; suborder Alepisauroidei) and are most closely aligned with lancetfish (family Alepisauridae), hammerjaws (family Omosudidae) and daggertooths (family Anotopteridae). Like their close relatives, barracudinas lack swim bladders and are simultaneous hermaphrodites, a reproductive mode which is rare among vertebrates. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semelparous
Semelparity and iteroparity are two contrasting reproductive strategies available to living organisms. A species is considered semelparous if it is characterized by a single reproductive episode before death, and iteroparous if it is characterized by multiple reproductive cycles over the course of its lifetime. Iteroparity can be further divided into continuous iteroparity (primates including humans and chimpanzees) and seasonal iteroparity (birds, dogs, etc.) Some botanists use the parallel terms monocarpy and polycarpy. (See also plietesials.) In truly semelparous species, death after reproduction is part of an overall strategy that includes putting all available resources into maximizing reproduction, at the expense of future life (see § Trade-offs). In any iteroparous population there will be some individuals who die between their first and second reproductive episodes, but unless this is part of a syndrome of programmed death after reproduction, this would not be called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
