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Opisthoteuthis Grimaldii
''Opisthoteuthis grimaldii'' is an octopus found near the Azores. ''O. grimaldii'' lives in the Northeast Atlantic Ocean from deep. This species lives far deeper than other Opisthoteuthis members in the Atlantic. The type specimen, upon which the species' description was based, was captured near Faial Island. The octopus has been found as far south as Namibian waters and as far north as British waters. In the early 1900s, many octopuses living all over the Atlantic and Indian oceans were classed as ''Opisthoteuthis grimaldii'', but later scientists decided that only those specimens found in the Eastern Atlantic Ocean actually belonged to the species. This octopus occupies in the bathyal zone, a deep area of the ocean where no sunlight reaches. Like many other cirrate octopuses, it lives on or just above the seafloor. ''Opisthoteuthis grimaldii'' is anatomically very similar to ''Opisthoteuthis borealis'', but the two species have differently structured digestive systems. It h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azores
) , motto =( en, "Rather die free than subjected in peace") , anthem= ( en, "Anthem of the Azores") , image_map=Locator_map_of_Azores_in_EU.svg , map_alt=Location of the Azores within the European Union , map_caption=Location of the Azores within the European Union , subdivision_type=Sovereign state , subdivision_name=Portugal , established_title=Settlement , established_date=1432 , established_title3=Autonomous status , established_date3=30 April 1976 , official_languages=Portuguese , demonym= ( en, Azorean) , capital_type= Capitals , capital = Ponta Delgada (executive) Angra do Heroísmo (judicial) Horta (legislative) , largest_city = Ponta Delgada , government_type=Autonomous Region , leader_title1=Representative of the Republic , leader_name1=Pedro Manuel dos Reis Alves Catarino , leader_title2= President of the Legislative Assembly , leader_name2= Luís Garcia , leader_title3= President of the Regional Government , leader_name3=José Manuel Bolieiro , le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opisthoteuthis
''Opisthoteuthis'' is a genus of cirrate octopuses, sometimes known as flapjack octopuses, which are found in all the world's oceans. Behavior Like other cirrates, octopuses in Opisthoteuthis are generally small, and many dwell in the deep sea. They have cirri on their arms, internal shells to support their bodies, and muscular fins for steering. Like octopuses of Grimpoteuthis ''Grimpoteuthis'' is a genus of pelagic umbrella octopuses known as the dumbo octopuses. The name "dumbo" originates from their resemblance to the title character of Disney's 1941 film ''Dumbo'', having a prominent ear-like fin which extends from ..., opisthoteuthids have been seen resting or crawling on the seafloor. Species The following 24 species have been placed in ''Opisthoteuthis'': Notes References External links * * {{Taxonbar, from=Q3816282 Octopuses Cephalopod genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faial Island
Faial Island (), also known in English as Fayal, is a Portugal, Portuguese island of the Central Group (Portuguese: ''Grupo Central'') of the Azores. The Capelinhos Volcano, the westernmost point of the island, may be considered the westernmost point of Europe, if the Monchique Islet, near Flores Island (Azores), Flores Island, is considered part of North America, for it sits on the North American Plate. Its largest town is Horta, Azores, Horta. With its nearest neighbours, Pico Island, Pico (east across the channel) and São Jorge Island, São Jorge (northeast across the channel), it forms an area commonly known as the ''Triângulo'' (English: ''Triangle''). The island has also been referred to as the Ilha Azul (English: ''Blue Island''), derived from the writings of Portuguese poet Raul Brandão, due to the large quantity of hydrangeas that bloom during the summer months: History During a period of medieval legends and unsubstantiated stories of mystical lands, the island ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bathyal Zone
The bathypelagic zone or bathyal zone (from Greek βαθύς (bathýs), deep) is the part of the open ocean that extends from a depth of below the ocean surface. It lies between the mesopelagic above, and the abyssopelagic below. The bathypelagic is known as the midnight zone because of the lack of sunlight; this feature does not allow for photosynthesis-driven primary production, preventing growth of phytoplankton or aquatic plants. Although larger by volume than the photic zone, our knowledge of the bathypelagic zone remains limited by our ability to explore the deep ocean. Physical characteristics The bathypelagic zone is characterized by a nearly constant temperature of approximately and a salinity range of 33-35 g/kg. This region has little to no light, because sunlight does not reach this deep in the ocean and bioluminescence is limited. The hydrostatic pressure in this zone ranges 100-400 atmospheres (atm), due to the increase of 1 atm for every 10 m depth. It is bel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opisthoteuthis Borealis
''Opisthoteuthis borealis'' is a lesser-known species of octopus found near Greenland and Iceland, especially in the Davis Strait. The species was described from 9 specimens, and is one of the most recent Opisthoteuthis species described. Not much is known about it besides its anatomy and habitat. Description ''Opisthoteuthis borealis'' belongs to the order Cirrata, a subdivision of octopuses which have fleshy fins to assist in swimming, internal shells supporting their bodies, and two threadlike structures called cirri for each sucker. Many cirrate octopuses live in deep water. Octopuses in the species ''Opisthoteuthis borealis'' have mantles up to long. They are medium-sized when compared to closely related species. They have long arms and large eyes. Males of ''O. borealis'' have some enlarged suckers; their purpose is unknown. Females don't have enlarged suckers. This specific kind of sex difference, or sexual dimorphism, is also seen in Opisthoteuthis albatrossi and Opist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opisthoteuthis Massyae
''Opisthoteuths massyae'' is an octopus living in the eastern Atlantic Ocean. ''O. massyae'' occupies the benthic zone (seafloor and water immediately above) of the open ocean. The octopus lives from to deep. It's found as far north as Ireland, in the Rockall Basin, and as far south as Namibia. There are more specimens in the southeast Atlantic than in the northeast Atlantic. The two foremost arms of mature males are thicker than their other six arms. This is unusual for ''Opisthoteuthis'' species. Mature males also have some enlarged suckers, which is more typical of the genus. Males have more suckers than females. Specimens with longer arms generally have more suckers. Males weigh more than females; males can reach a weight of , and females a weight of . Females may lay eggs throughout their lifetimes. ''O. massyae'' has the ability to invert or "balloon" their webs. ''O. massyae'' is a carnivore; it probably catches prey by enveloping small animals within its web, simila ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radula
The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus. The radula is unique to the molluscs, and is found in every class of mollusc except the bivalves, which instead use cilia, waving filaments that bring minute organisms to the mouth. Within the gastropods, the radula is used in feeding by both herbivorous and carnivorous snails and slugs. The arrangement of teeth ( denticles) on the radular ribbon varies considerably from one group to another. In most of the more ancient lineages of gastropods, the radula is used to graze, by scraping diatoms and other microscopic algae off rock surfaces and other substrates. Predatory marine snails such as the Naticidae use the radula plus an acidic secretion to bore through the shell of other molluscs. Other predatory marine snails ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopuses
An octopus ( : octopuses or octopodes, see below for variants) is a soft-bodied, eight- limbed mollusc of the order Octopoda (, ). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids. Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a beaked mouth at the center point of the eight limbs. The soft body can radically alter its shape, enabling octopuses to squeeze through small gaps. They trail their eight appendages behind them as they swim. The siphon is used both for respiration and for locomotion, by expelling a jet of water. Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse of all invertebrates. Octopuses inhabit various regions of the ocean, including coral reefs, pelagic waters, and the seabed; some live in the intertidal zone and others at abyssal depths. Most species grow quickly, mature early, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molluscs Described In 1903
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species. The gast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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