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Sabellaria Spinulosa
''Sabellaria spinulosa'' is a species of marine polychaete worm in the family Sabellariidae, commonly known as the Ross worm. It lives in a tube built of sand, gravel and pieces of shell. Description ''Sabellaria spinulosa'' lives in a tube made of shell fragments and coarse sand cemented together with mucus. The tube has a circular cross section and can be closed by an operculum formed by bristles growing on the head of the worm. There are several thoracic segments and the abdomen has many segments that have hooked bristles on raised lobes. The worm's distinguishing features include three thoracic segments with paired chaetal sheaths, pointed opercular chaetae and an outer layer of serrated chaetae.Ross worm - ''Sabellaria spinulosa''. |
Rudolf Leuckart
Karl Georg Friedrich Rudolf Leuckart (7 October 1822 – 22 February 1898) was a German zoologist born in Helmstedt. He was a nephew to naturalist Friedrich Sigismund Leuckart (1794–1843). Academic career He earned his degree from the University of Göttingen, where he was a student of Rudolf Wagner (1805–1864). Afterwards he participated on a scientific expedition to the North Sea for the study marine invertebrates. Later he became a professor of zoology at the University of Giessen (1850) and the University of Leipzig (1869).ADB: Leuckart, Rudolf @ ''''. Parasitological research Leuckart is remembered for his wo ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zooplankton
Zooplankton are the animal component of the planktonic community ("zoo" comes from the Greek word for ''animal''). Plankton are aquatic organisms that are unable to swim effectively against currents, and consequently drift or are carried along by currents in the ocean, or by currents in seas, lakes or rivers. Zooplankton can be contrasted with phytoplankton, which are the plant component of the plankton community ("phyto" comes from the Greek word for ''plant''). Zooplankton are heterotrophic (other-feeding), whereas phytoplankton are autotrophic (self-feeding). This means zooplankton cannot manufacture their own food but must eat other plants or animals instead — in particular they eat phytoplankton. Zooplankton are generally larger than phytoplankton, most are microscopic, but some (such as jellyfish) are macroscopic and can be seen with the naked eye. Many protozoans (single-celled protists that prey on other microscopic life) are zooplankton, including zooflagellates, fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sabellida
Sabellida is an order of annelid worms in the class Polychaeta. They are filter feeders with no buccal organ. The prostomium is fused with the peristomium and bears a ring of feathery feeding tentacles. They live in parchment-like tubes made of particles from their environment such as sand and shell fragments cemented together with mucus. Members of the suborder include the s (Sabellidae) and serpulid worms (Serpulidae). Among the species are the giant feather duster worm ('' |
Wadden Sea
The Wadden Sea ( nl, Waddenzee ; german: Wattenmeer; nds, Wattensee or ; da, Vadehavet; fy, Waadsee, longname=yes; frr, di Heef) is an intertidal zone in the southeastern part of the North Sea. It lies between the coast of northwestern continental Europe and the range of low-lying Frisian Islands, forming a shallow body of water with tidal flats and wetlands. It has a high biological diversity and is an important area for both breeding and migrating birds. In 2009, the Dutch and German parts of the Wadden Sea were inscribed on UNESCO's World Heritage List and the Danish part was added in June 2014. The Wadden Sea stretches from Den Helder, in the northwest of the Netherlands, past the great river estuaries of Germany to its northern boundary at Skallingen in Denmark along a total coastline of some and a total area of about . Within the Netherlands, it is bounded from the IJsselmeer by the Afsluitdijk. Historically, the coastal regions were often subjected to large floods, r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queen Scallop
The queen scallop (''Aequipecten opercularis'') is a medium-sized species of scallop, an edible marine bivalve mollusk in the family Pectinidae, the scallops. It is found in the northeast Atlantic and is important in fisheries. Description At about in size, this is one of the smaller scallop species which are commercially exploited. The shell of this species is sometimes quite colourful, and it is also thin and brittle. It has about twenty radiating umbones. The left valve is slightly more convex than the right one. One auricle of the right valve is larger than the other which creates a notch near the hinge used by the modified foot in young scallops to spin byssal threads. Older scallops are free swimming. Right and left valve of the same specimen: File:Aequipecten opercularis 01.jpg, Right valve File:Aequipecten opercularis 02.jpg, Left valve Life habits The queen scallop feeds on a diet of plankton, and is commonly found up to below mean sea level, although it has bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pandalus Montagui
''Pandalus montagui'' is a species of cold-water shrimp in the family Pandalidae. It is the type species of the genus ''Pandalus'' and is variously known as the pink shrimp, Aesop shrimp and Aesop prawn.''Pandalus montagui'' (Leach, 1814) FAO: Fisheries and Aquaculture Department. Retrieved 2011-11-04. Description ''Pandalus montagui'' is a translucent, pinkish shrimp, generally growing to about long. Its colour is due to a number of red s and the few short red streaks running obliquely on the . The |
Pisidia Longicornis
''Pisidia longicornis'', the long-clawed porcelain crab, is a species of porcelain crab that lives in the north-eastern Atlantic Ocean. It varies from reddish to white, and grows to a carapace width of . It was first named by Carl Linnaeus in 1767, although the etymology remains unclear. Description Adult ''Pisidia longicornis'' typically have a carapace length of . Its colouration is variable, with most individuals being reddish or orange, but some having patches of pearly white, or even being entirely white. One cheliped (claw-bearing appendage) is usually larger than the other, although this difference is less pronounced in females than in males. The fifth pair of legs is reduced in size and may be difficult to see. Distribution and ecology ''Pisidia longicornis'' is found in the north-eastern Atlantic Ocean from Norway to Angola, and throughout the Mediterranean Sea. It is found from the lower shore down to depths of in the north Atlantic, but at depths of in some location ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacean
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Invertebrate
Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate subphylum Vertebrata. Familiar examples of invertebrates include arthropods, mollusks, annelids, echinoderms and cnidarians. The majority of animal species are invertebrates; one estimate puts the figure at 97%. Many invertebrate taxa have a greater number and variety of species than the entire subphylum of Vertebrata. Invertebrates vary widely in size, from 50 μm (0.002 in) rotifers to the 9–10 m (30–33 ft) colossal squid. Some so-called invertebrates, such as the Tunicata and Cephalochordata, are more closely related to vertebrates than to other invertebrates. This makes the invertebrates paraphyletic, so the term has little meaning in taxonomy. Etymology The word "invertebrate" comes from the Latin word ''vertebra'', whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biodiversity
Biodiversity or biological diversity is the variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic (''genetic variability''), species (''species diversity''), and ecosystem (''ecosystem diversity'') level. Biodiversity is not distributed evenly on Earth; it is usually greater in the tropics as a result of the warm climate and high primary productivity in the region near the equator. Tropical forest ecosystems cover less than 10% of earth's surface and contain about 90% of the world's species. Marine biodiversity is usually higher along coasts in the Western Pacific, where sea surface temperature is highest, and in the mid-latitudinal band in all oceans. There are latitudinal gradients in species diversity. Biodiversity generally tends to cluster in hotspots, and has been increasing through time, but will be likely to slow in the future as a primary result of deforestation. It encompasses the evolutionary, ecological, and cultural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sabellaria Alveolata
''Sabellaria alveolata'', (also known as the honeycomb worm), is a reef-forming polychaete. It is distributed around the Mediterranean Sea, and from the north Atlantic Ocean to south Morocco. It is also found in the British Isles at its northern limit in the northeast Atlantic. Its common name is derived from the honeycomb-like pattern it creates when building its tube reefs. Description ''Sabellaria alveolata'' is an annelid (ringed worm) that lives in small tubes it constructs from cemented coarse sand and/or shell material, forming reefs. The tubes are arranged in close proximity and have a distinctive honeycomb-like appearance. These reefs range from to thick and take the form of hummocks, sheets or more massive formations. Adult size ranges from . The thorax has three pairs of flattened chaetal sheaths, its chaetes form an operculum which is used to seal the tube opening. Depending on the local substrate, the colour of the tube varies. Distribution ''Sabellaria alveol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pecten Maximus
''Pecten maximus'', common names the great scallop, king scallop, St James shell or escallop, is a northeast Atlantic species of scallop, an edible saltwater clam, a marine bivalve mollusc in the family Pectinidae. This is the type species of the genus. This species may be conspecific with '' Pecten jacobaeus'', the pilgrim's scallop, which has a much more restricted distribution. Description The shell of ''Pecten maximus'' is quite robust and is characterised by having "ears" of equal size on either side of the apex. The right, or lower, valve is convex and slightly overlaps the flat left, or upper, valve, which is flat. Larger specimens have a nearly circular outline and the largest may measure 21 cm in length. The "ears" are prominent and are a minimum of half the width of the shell with the byssal notch situated in the right anterior ear being slight and not serrated. The sculpture of the valves is distinctive and consists of 12 to 17 wide radiating ribs and numerous co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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