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Manania Handi
''Manania handi'' is a species of stalked jellyfish found in the Pacific Ocean along the west coast of North America. This species can be found in shallow waters at low tide on soft substrates such as seagrass (''Phyllospadix''), but the related '' M. gwilliami'' have also been recovered at depths of >10 metres. This may reflect that intertidal specimens represent the fringes of a population that is typically more commonly found in the subtidal The neritic zone (or sublittoral zone) is the relatively shallow part of the ocean above the drop-off of the continental shelf, approximately in depth. From the point of view of marine biology it forms a relatively stable and well-illuminated ... zone. ''Manania handi'' reaches a length of up to 4 cm, but the diameter of the bell at the oral end is relatively narrow at approximately 2 cm in fully-grown specimens. Distinctive pigment bands along the calyx and the relatively short stalk (or peduncle) distinguish it from rela ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stauromedusae
Stauromedusae are the stalked jellyfishes. They are the sole living members of the class Staurozoa and belong to the medusozoa subphylum of Cnidaria. They are unique among medusa jellyfish in that they do not have an alternation of polyp and medusa life cycle phases, but are instead interpreted as an attached medusa stage. With a lifestyle more resembling that of polypoid forms. They have a generally trumpet-shaped body, oriented upside-down in comparison with other jellyfish, with the tentacles projecting upwards, and the stalk located in the centre of the umbrella. Members of this class are commonly found in relatively cold waters, close to the shoreline. Sexually mature stauromedusae free-spawn eggs or sperm, which fertilize in the sea and form a creeping, unciliated planula larva. The larvae crawl across the sea floor and find a suitable place, attaching themselves typically to rock or algae, where they eventually develop into a new, attached stauromedusa. Unlike most scypho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phyllospadix
''Phyllospadix'', surfgrass, is a genus of seagrass, a flowering plant in the family Zosteraceae, described as a genus in 1840. ''Phyllospadix'' grows in marine waters along the coasts of the temperate North Pacific. It is one of the seagrass genera that can perform completely submerged pollination. Species ;Accepted species *'' Phyllospadix iwatensis'' – China, Korea, Japan, Russian Far East *'' Phyllospadix japonicus'' – China, Korea, Japan *'' Phyllospadix juzepczukii'' – Russian Far East *'' Phyllospadix scouleri'' (type species) – Alaska to Baja California *'' Phyllospadix serrulatus'' – Alaska, British Columbia, Washington *''Phyllospadix torreyi'' – British Columbia to northwestern Mexico References * External links Imagesof ''Phyllospadix'' at Algaebase AlgaeBase is a global species database of information on all groups of algae, both marine and freshwater, as well as sea-grass. History AlgaeBase began in March 1996, founded by Michael ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manania Gwilliami
''Manania gwilliami'' is a species of stalked jellyfish found in intertidal and subtidal The neritic zone (or sublittoral zone) is the relatively shallow part of the ocean above the drop-off of the continental shelf, approximately in depth. From the point of view of marine biology it forms a relatively stable and well-illuminated ... zones on the west coast of North America. The stalk (peduncle) is described as being as long or longer than the calyx; the calyx typically has mottled pigmentation throughout. The name "''gwilliami''" refers to G.F. Gwilliam who described a number of stauromedusae in the mid-20th century. References Haliclystidae {{Staurozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intertidal
The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species of life, such as seastars, sea urchins, and many species of coral with regional differences in biodiversity. Sometimes it is referred to as the ''littoral zone'' or '' seashore'', although those can be defined as a wider region. The well-known area also includes steep rocky cliffs, sandy beaches, bogs or wetlands (e.g., vast mudflats). The area can be a narrow strip, as in Pacific islands that have only a narrow tidal range, or can include many meters of shoreline where shallow beach slopes interact with high tidal excursion. The peritidal zone is similar but somewhat wider, extending from above the highest tide level to below the lowest. Organisms in the intertidal zone are adapted to an environment of harsh extremes, living in water pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subtidal
The neritic zone (or sublittoral zone) is the relatively shallow part of the ocean above the drop-off of the continental shelf, approximately in depth. From the point of view of marine biology it forms a relatively stable and well-illuminated environment for marine life, from plankton up to large fish and corals, while physical oceanography sees it as where the oceanic system interacts with the coast. Definition (marine biology), context, extra terminology In marine biology, the neritic zone, also called coastal waters, the coastal ocean or the sublittoral zone, refers to that zone of the ocean where sunlight reaches the ocean floor, that is, where the water is never so deep as to take it out of the photic zone. It extends from the low tide mark to the edge of the continental shelf, with a relatively shallow depth extending to about 200 meters (660 feet). Above the neritic zone lie the intertidal (or eulittoral) and supralittoral zones; below it the continental slope begin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calyx (anatomy)
Calyx is a term used in animal anatomy for some cuplike areas or structures. Etymology Latin, from ''calyx'' (from Ancient Greek ''κάλυξ, ''case of a bud, husk"). Cnidarians The spicules containing the basal portion of the upper tentacular part of the polyp of some soft corals (also called ''calice''). Entoprocta A body part of the Entoprocta from which tentacles arise and the mouth and anus are located. Echinoderms The body disk that is covered with a leathery tegumen containing calcareous plates (in crinoids and ophiuroids the main part of the body where the viscera are located). Humans Either a minor calyx in the kidney, a conglomeration of two or three minor calyces to form a major calyx, or the Calyx of Held, a particularly large synapse in the mammalian auditory central nervous system, named by H. Held in his 1893 article ''Die centrale Gehörleitung'', due to its flower-petal-like shape. Satzler, K., L. F. Sohl, et al. (2002). "Three-dimensional reconstruct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manania
''Manania'' are a genus of stalked jellyfish in the family Haliclystidae. Species The following lists described species of ''Manania'' : *'' Manania atlantica'' (Berrill, 1962) *'' Manania auricula'' (Fabricius, 1780) *'' Manania distincta'' (Kishinouye, 1910) *''Manania gwilliami'' Larson & Fautin, 1989 *''Manania handi ''Manania handi'' is a species of stalked jellyfish found in the Pacific Ocean along the west coast of North America. This species can be found in shallow waters at low tide on soft substrates such as seagrass (''Phyllospadix''), but the related ...'' Larson & Fautin, 1989 *'' Manania hexaradiata'' (Broch, 1907) *'' Manania uchidai'' (Naumov, 1961) References Haliclystidae Medusozoa genera {{Staurozoa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nematocyst
A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive cell containing one large secretory organelle called a cnidocyst (also known as a cnida () or nematocyst) that can deliver a sting to other organisms. The presence of this cell defines the phylum Cnidaria ( corals, sea anemones, hydrae, jellyfish, etc.). Cnidae are used to capture prey and as a defense against predators. A cnidocyte fires a structure that contains a toxin within the cnidocyst; this is responsible for the stings delivered by a cnidarian. Structure and function Each cnidocyte contains an organelle called a cnida, cnidocyst, nematocyst, ptychocyst or spirocyst. This organelle consists of a bulb-shaped capsule containing a coiled hollow tubule structure attached to it. An immature cnidocyte is referred to as a cnidoblast or nematoblast. The externally oriented side of the cell has a hair-like trigger called a cnidocil, which is a mechano- and chemo-receptor. When the trigger is activated, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadet Hand
A cadet is an officer trainee or candidate. The term is frequently used to refer to those training to become an officer in the military, often a person who is a junior trainee. Its meaning may vary between countries which can include youths in voluntary youth organisations. Usage by country Antigua and Barbuda The Antigua and Barbuda Cadet Corps consists of students between the ages of 12 and 19. It Is a voluntary youth organization, sponsored by the government and people of Antigua & Barbuda that acquires its membership from the Secondary School. The main objective is to provide training and personal development to the youths through paramilitary activities and also embrace community activities. The training is geared to inspire young men and woman to become model citizens. Emphasis during training is often based on discipline, loyalty, leadership and good citizenry. Presently, the cadet corps has 200 active members and falls under the direct command of Colonel Glyne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
