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Venus Flytrap Sea Anemone
The Venus flytrap sea anemone (''Actinoscyphia aurelia'') is a large sea anemone that superficially resembles a Venus flytrap. It closes its tentacles to capture prey or to protect itself. It is a deep ocean species. Distribution This sea anemone is found in muddy situations at bathyal depths in deep water canyons in the Gulf of Mexico. It has also been observed at several sites in the upwelling region off the coast of West Africa as well as the American Samoan region of the Pacific, but is uncommon elsewhere. Biology Venus flytrap sea anemone is a passive suspension feeder, and orients itself on its often slender column so that it faces the upwelling current. Its pedal disc is small, and its tentacles are short compared to the large, concave oral disc, which is funnel or mushroom-shaped. It extends its tentacles in two rows, one reflexed back and one sloping forward, and collects food particles as they drift past. Although usually considered sessile, the Venus flytrap sea an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Alan Stephenson
Thomas Alan Stephenson Royal Society, FRS (19 January 1898 – 3 April 1961) was a British naturalist, and marine biology, marine biologist, specialising in sea anemones. Education Stephenson was born at Burnham-on-Sea, the son of a Minister of religion, minister and amateur botany, botanist. He soon developed an interest in natural history and went to study at University of Wales, Aberystwyth, University College, Aberystwyth. He began to study the local sea anemones there, but had to abandon his studies because of illness. Despite not completing his degree, he was made a staff member and was later awarded a doctorate for the body of work that he had produced. Career Stephenson held a number of academic posts in Britain, and at the University of Cape Town, South Africa. His final position was that of Professor and Head of the Department of Zoology at the University College of Wales, Aberystwyth. The National Marine Biological Library at the Marine Biological Association of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detritus
In biology, detritus () is dead particulate organic material, as distinguished from dissolved organic material. Detritus typically includes the bodies or fragments of bodies of dead organisms, and fecal material. Detritus typically hosts communities of microorganisms that colonize and decompose (i.e. remineralize) it. In terrestrial ecosystems it is present as leaf litter and other organic matter that is intermixed with soil, which is denominated " soil organic matter". The detritus of aquatic ecosystems is organic material that is suspended in the water and accumulates in depositions on the floor of the body of water; when this floor is a seabed, such a deposition is denominated "marine snow". Theory The corpses of dead plants or animals, material derived from animal tissues (e.g. molted skin), and fecal matter gradually lose their form due to physical processes and the action of decomposers, including grazers, bacteria, and fungi. Decomposition, the process by which or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colossendeis
Colossendeis is a genus of sea spider (class Pycnogonida) belonging to the family Colossendeidae. The genus ''Colossendeis'' includes the largest pycnogonids, with leg spans of about . These sea spiders can be found in deep-sea. The genus contains bioluminescent species. Species * '' Colossendeis acuta'' Stiboy-Risch, 1993 * '' Colossendeis adelpha'' Child, 1998 * '' Colossendeis angusta'' Sars, 1877 * '' Colossendeis aperta'' Turpaeva, 2005 * '' Colossendeis arcanus'' Turpaeva, 2008 * '' Colossendeis arcuata'' A. Milne-Edwards, 1885 * '' Colossendeis australis'' Hodgson, 1907 * '' Colossendeis avidus'' Pushkin, 1970 * '' Colossendeis belekurovi'' Pushkin, 1993 * '' Colossendeis bicincta'' Schimkewitsch, 1893 * '' Colossendeis brevirostris'' Child, 1995 * '' Colossendeis bruuni'' Fage, 1956 * ''Colossendeis clavata'' Meinert, 1899 * ''Colossendeis colossea'' Wilson, 1881 * '' Colossendeis concedis'' Child, 1995 * '' Colossendeis cucurbita'' Cole, 1909 * ''Colossendeis curtiros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Spider
Sea spiders are marine arthropods of the order Pantopoda ( ‘all feet’), belonging to the class Pycnogonida, hence they are also called pycnogonids (; named after ''Pycnogonum'', the type genus; with the suffix '). They are cosmopolitan, found in oceans around the world. The over 1,300 known species have legs ranging from to over . Most are toward the smaller end of this range in relatively shallow depths; however, they can grow to be quite large in Antarctic and deep waters. Although "sea spiders" are not true spiders, or even arachnids, their traditional classification as chelicerates places them closer to true spiders than to other well-known arthropod groups, such as insects or crustaceans. This is in dispute, however, as genetic evidence suggests they may be the sister group to all other living arthropods. Description Sea spiders have long legs in contrast to a small body size. The number of walking legs is usually eight (four pairs), but the family Pycnogonidae hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penaeidae
Penaeidae is a family of marine crustaceans in the suborder Dendrobranchiata, which are often referred to as penaeid shrimp or penaeid prawns. The Penaeidae contain many species of economic importance, such as the tiger prawn, whiteleg shrimp, Atlantic white shrimp, and Indian prawn. Many prawns are the subject of commercial fishery, and farming, both in marine settings, and in freshwater farms. Lateral line–like sense organs on the antennae have been reported in some species of Penaeidae. At , the myelinated giant interneurons of pelagic penaeid shrimp have the world record for impulse conduction speed in any animal. Genera Of the 48 recognised genera in the family Penaeidae, 23 are known only from the fossil record (marked †): * † '' Albertoppelia'' Schweigert & Garassino, 2004 * † ''Ambilobeia'' Garassino & Pasini, 2002 * † ''Antrimpos'' Münster, 1839 * '' Artemesia'' Bate, 1888 * '' Atypopenaeus'' Alcock, 1905 * † '' Bombur'' Münster, 1839 * † ''Bylgia'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophiolepididae
Ophiolepididae are a family of brittle stars of the suborder Ophiurina. It includes both deep-sea and shallow-water species. Systematics and phylogeny The fossils of Ophiolepididae date back to the Anisian age of the Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided in chronostratigraphy. The Middle Triassic spans the time between Ma and .... The family includes the following living genera: *'' Amphipholizona'' *'' Aspidophiura'' *'' Ophiolepis'' *'' Ophiomaria'' *'' Ophiomidas'' *'' Ophiomusa'' *'' Ophioplinthus'' *'' Ophiothyreus'' *'' Ophiotrochus'' *'' Ophiozonoida'' *'' Ophiuroconis'' *'' Ophiurodon'' References Ophiurida Extant Early Cretaceous first appearances {{ophiuroidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesothuria
''Mesothuria'' is a genus of sea cucumbers belonging to the family Synallactidae. The genus has a cosmopolitan distribution. Species The following species are recognised in the genus ''Mesothuria'': *'' Mesothuria abberviata'' Koehler & Vaney, 1905 *'' Mesothuria abbreviata'' Koehler & Vaney, 1905 *''Mesothuria bifurcata'' Hérouard, 1901 *'' Mesothuria carnosa'' Fisher, 1907 *'' Mesothuria cathedralis'' Heding, 1940 *''Mesothuria crebrapedes ''Mesothuria'' is a genus of sea cucumbers belonging to the family Synallactidae. The genus has a cosmopolitan distribution. Species The following species are recognised in the genus ''Mesothuria'': *''Mesothuria abberviata'' Koehler & Vaney, 19 ...'' Cherbonnier & Féral, 1981 *'' Mesothuria deani'' Mitsukuri, 1912 *'' Mesothuria edwardensis'' Massin, 1992 *'' Mesothuria gargantua'' Deichmann, 1930 *'' Mesothuria holothurioides'' Sluiter, 1901 *'' Mesothuria incerta'' Koehler & Vaney, 1905 *'' Mesothuria intestinalis'' (Ascanius, 1805) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phormosoma Placenta
''Phormosoma placenta'' is a species of sea urchin in the order Echinothurioida. It is a deepwater species, seldom being found at depths less than , and occurs on either side of the Atlantic Ocean on the continental slope. Description ''Phormosoma placenta'' is a yellowish-brown colour and can grow to a diameter of . The flexible test is dome-shaped above and flattened beneath. The plates from which the test is made overlap each other and are bound together by a membranous connection. Specimens removed from the water usually collapse into disc shapes. The upper (aboral) surface has few primary tubercles and spines but the lower (oral) surface is densely covered in perforated tubercles from which slender, club-shaped spines project, each one embedded in a membranous sac. These spines articulate with the tubercles and are used to support the animal and also in locomotion. Observations of live individuals on the seabed show that the few spines on the aboral surface are also enclos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Urchin
Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of sea urchins are round and spiny, ranging in diameter from . Sea urchins move slowly, crawling with tube feet, and also propel themselves with their spines. Although algae are the primary diet, sea urchins also eat slow-moving (sessile) animals. Predators that eat sea urchins include a wide variety of fish, starfish, crabs, marine mammals. Sea urchins are also used as food especially in Japan. Adult sea urchins have fivefold symmetry, but their pluteus larvae feature bilateral (mirror) symmetry, indicating that the sea urchin belongs to the Bilateria group of animal phyla, which also comprises the chordates and the arthropods, the annelids and the molluscs, and are found in every ocean and in every climate, from the tropics to the pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennatula
''Pennatula'' is a genus of sea pens in the family Pennatulidae. The genus contains several bioluminescent species, including Pennatula rubra, Pennatula phosphorea ''Pennatula'' is a genus of sea pens in the Family (biology), family Pennatulidae. The genus contains several bioluminescent species, including Pennatula rubra, Pennatula phosphorea, and Pennatula aculeata. References Bioluminescent cnid ..., and Pennatula aculeata. References Bioluminescent cnidarians Pennatulidae Octocorallia genera {{Octocorallia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Pen
Sea pens are colonial marine cnidarians belonging to the order Pennatulacea. There are 14 families within the order; 35 extant genera, and it is estimated that of 450 described species, around 200 are valid. Sea pens have a cosmopolitan distribution, being found in tropical and temperate waters worldwide, as well as from the intertidal to depths of more than 6100 m. Sea pens are grouped with the octocorals, together with sea whips ('' gorgonians''). Although the group is named for its supposed resemblance to antique quill pens, only sea pen species belonging to the suborder Subselliflorae live up to the comparison. Those belonging to the much larger suborder Sessiliflorae lack feathery structures and grow in club-like or radiating forms. The latter suborder includes what are commonly known as sea pansies. The earliest accepted fossils are known from the Cambrian-aged Burgess Shale (''Thaumaptilon''). Similar fossils from the Ediacaran (ala ''Charnia'') may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
