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Pagurus Hirsutiusculus
''Pagurus hirsutiusculus'' is a species of hermit crab, commonly called the hairy hermit crab. It lives from the Bering Strait south to California and Japan, from the intertidal zone to a depth of . Description Adults range in color from olive green to brown to black. Distinguishing characteristics of this hermit crab are white and often also blue bands on the walking legs. The antennae are grayish-brown with distinct white bands. This hermit crab is also easily identified by the remarkable amount of hair covering its body. The carapace of an adult ''P. hirsutiusculus'' may measure up to in length, and the animal's body may grow to in northern populations. Populations further south than Puget Sound are smaller and less hairy, and have been recognized as a separate subspecies, ''P. h. venturensis''. Range and habitat ''P. hirsutiusculus'' is found from the Pribilof Islands, Alaska to southern alifornia and from the Bering Strait south to Japan. It lives at depths ranging f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Dwight Dana
James Dwight Dana Royal Society of London, FRS FRSE (February 12, 1813 – April 14, 1895) was an American geologist, mineralogist, volcanologist, and zoologist. He made pioneering studies of mountain-building, volcano, volcanic activity, and the origin and structure of continents and oceans around the world. His zoological author abbreviation is Dana. Early life and career Dana was born February 12, 1813, in Utica, New York. His father was merchant James Dana (1780–1860) and his mother was Harriet Dwight (1792–1870). Through his mother he was related to the Dwight New England family of missionaries and educators including uncle Harrison Gray Otis Dwight and first cousin Henry Otis Dwight. He showed an early interest in science, which had been fostered by Fay Edgerton, a teacher in the Utica high school, and in 1830 he entered Yale College in order to study under Benjamin Silliman the elder. Graduating in 1833, for the next two years he was teacher of mathematics to midshi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breaking Wave
In fluid dynamics, a breaking wave or breaker is a wave whose amplitude reaches a critical level at which large amounts of wave energy transform into Wave turbulence, turbulent kinetic energy. At this point, simple physical models that describe wave dynamics often become invalid, particularly those that assume linear behaviour. The most generally familiar sort of breaking wave is the breaking of ocean surface wave, water surface waves on a coastline. Wave breaking generally occurs where the amplitude reaches the point that the crest of the wave actually overturns—the types of breaking water surface waves are discussed in more detail below. Certain other effects in fluid dynamics have also been termed "breaking waves," partly by analogy with water surface waves. In meteorology, atmospheric gravity waves are said to break when the wave produces regions where the potential temperature decreases with height, leading to energy dissipation through convective instability; likewise, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopoda
Isopoda is an order of crustaceans that includes woodlice and their relatives. Isopods live in the sea, in fresh water, or on land. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, and five pairs of branching appendages on the abdomen that are used in respiration. Females brood their young in a pouch under their thorax. Isopods have various feeding methods: some eat dead or decaying plant and animal matter, others are grazers, or filter feeders, a few are predators, and some are internal or external parasites, mostly of fish. Aquatic species mostly live on the seabed or bottom of freshwater bodies of water, but some taxa can swim for a short distance. Terrestrial forms move around by crawling and tend to be found in cool, moist places. Some species are able to roll themselves into a ball as a defense mechanism or to conserve moisture. There are over 10,000 identified species of isopod worldwide, with around 4,50 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitism
Parasitism is a Symbiosis, close relationship between species, where one organism, the parasite, lives on or inside another organism, the Host (biology), host, causing it some harm, and is Adaptation, adapted structurally to this way of life. The entomologist E. O. Wilson has characterised parasites as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as Armillaria mellea, honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the Orobanchaceae, broomrapes. There are six major parasitic Behavioral ecology#Evolutionarily stable strategy, strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), wikt:trophic, trophicallytransmitted parasitism (by being eaten), Disease vector, vector-transmitted paras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Juan Archipelago
The San Juan Islands are an archipelago in the Pacific Northwest of the United States between the U.S. state of Washington and Vancouver Island, British Columbia, Canada. The San Juan Islands are part of Washington state, and form the core of San Juan County. In the archipelago, four islands are accessible to vehicular and foot traffic via the Washington State Ferries system.San Juan Islands Route Map , Washington State Ferries 
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Channeled Whelk
''Busycotypus canaliculatus'', commonly known as the channeled whelk, is a very large predatory sea snail, a marine prosobranch gastropod, a busycon whelk, belonging to the family Busyconidae.Fraussen, K.; Rosenberg, G. (2012). Busycotypus canaliculatus (Linnaeus, 1758). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=160192 on 2012-08-30 Distribution This species is endemic to the eastern coast of the United States, from Cape Cod, Massachusetts to northern Florida. It has also been introduced into San Francisco Bay. Shell description Shells of the channeled whelk typically reach 5 to 8 inches in length. The shell is smooth and subpyriform (generally pear-shaped), with a large body whorl and a straight siphonal canal. Between the whorls there is a wide, deep channel at the suture, and there are often weak knobs at the shoulders of the whorls. Finely sculpted lines begin at the siphonal canal and revolve arou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urosalpinx Cinerea
''Urosalpinx cinerea'', common name the eastern oyster drill or Atlantic oyster drill, is a species of small predatory sea snail, a marine gastropod mollusk in the family Muricidae, the murexes or rock snails. They use chemoreception in their environment and are found to be sessile and encrusting organisms. Microscopic particles released by prey are carried through the sea water and captured by the Atlantic oyster drill. This animal is not physically able to close itself from its surrounding environment because of its siphonal canal. This species is a serious problem in commercial oyster beds, and it has been accidentally introduced well outside its natural range. Distribution This snail is endemic to the Atlantic coast of North America, from Nova Scotia to Nassau Sound in in Florida. It has been accidentally introduced with oyster spat to Northern Europe and to the West Coast of North America from California to Washington. They range in areas with salinity and temperature cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ilyanassa Obsoleta
The eastern mudsnail, ''Ilyanassa obsoleta'', is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the nassa mud snails.MolluscaBase eds. (2021). MolluscaBase. Ilyanassa obsoleta (Say, 1822). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=467490 on 2021-09-04 Shell description This species has a small shell with a slightly rough exterior, because the surface has intersecting weak spiral and axial ribs. The shell has an oval aperture with a small notch or siphonal canal at the anterior end. The aperture has a smooth inner lip with a partial shield, and the outer lip is thin and smooth. The exterior of the shell is chalky white, but it is covered by a very dark brown, closely adhering periostracum, except in areas of the shell where the periostracum has been eroded. The apex of the shell is almost always eroded, and the shell is often quite damaged by the acidic properties of the mud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homalopoma Luridum
''Homalopoma luridum'', with the common name: Dall's dwarf turban, is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Colloniidae.Rosenberg, G. (2012). ''Homalopoma luridum'' (Dall, 1885). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=528071 on 2013-02-10 Description The height of the shell varies between 6 mm and 10 mm. Its color is red, ashen or purple. The small, globose shell is very solid and imperforate. The spire is conic, more or less depressed. The suture is moderately impressed. There are five whorls. These are slightly convex, the last decidedly deflected toward the aperture, encircled by about fifteen subequal spiral lirae, separated by interstices about as wide as the ridges. The incremental striae are generally strongly developed, causing the liree to appear nodose or somewhat irregular, and the interstices to appear pitted. The oblique aperture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alia Carinata
''Alia carinata'', common name the carinate dove shell, is a species of very small sea snail, a marine gastropod mollusc in the family Columbellidae, the dove snails.Monsecour, K. (2012). Alia carinata (Hinds, 1844). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=511703 on 2012-11-22 Distribution This species is found in the Eastern Pacific, from Alaska to Baja California, Mexico. Description The adult size of the shell of this species of dove snail can be between 6 mm and 10 mm in length.McLean, James H., 1978 ''Marine Shells of Southern California'', Natural History Museum of Los Angeles County Museum, Science Series 24, Revised Edition: p. 48 The body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ... ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epitonium Tinctum
''Epitonium'' is a genus of small predatory sea snails, marine gastropod mollusks. ''Epitonium'' is the type genus of the family Epitoniidae, the wentletraps.Bouchet, P.; Gofas, S. (2010). Epitonium Röding, 1798. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=137943 on 2010-11-22 The common name wentletraps is derived from the Dutch word ''wenteltrap'', denoting a spiral staircase. This refers to the striking form and sculpture of the shells of the mollusks in this genus, and to a lesser extent, the whole family. The genus ''Epitonium'' has been divided in the past by some authors into several subgenera, but these subgenera were based only on shell characters and did not reflect the true underlying relationships or phylogeny. Shell description ''Epitonium'' shells are high-spired, and are all-white in most of the species within thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tectarius Striatus
''Tectarius striatus'' is a species of sea snail, a marine gastropod mollusk in the family Littorinidae, the winkles or periwinkles. It is endemic to Macaronesia (Azores, Madeira, Savage Islands, Canary Islands and Cape Verde , national_anthem = () , official_languages = Portuguese , national_languages = Cape Verdean Creole , capital = Praia , coordinates = , largest_city = capital , demonym ...). Description Distribution References Littorinidae Gastropods described in 1832 Molluscs of Macaronesia {{Littorinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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