|
Elthusa Californica
''Elthusa californica'' is a species of isopod in the family Cymothoidae of the order Isopoda. ''E.'' ''californica'' is a saltwater parasitic isopod. Like many species of the '' Elthusa'' genus,'' E. californica'' was first placed in within the ''Liveneca'' genus, but later underwent taxonomic revisions. Anatomy and morphology The body of ''E. californica'' is oblong/oval-shaped, typical of the vaulted body shape expected from its genus. On average, the body length is around 16 mm, while the body width is around 7 mm. In general, the body length is slightly more than twice its body width. Due to the slightly shorter body length on the right side of ''E. californica'', the body is slightly twisted. The head of ''E. californica'' is about 2 mm wide. It is triangular and has a strong and blunt outline on the anterior end. The cephalon posterior margin is not trilobed, once again typical characteristic of organisms found in ''Elthusa''. Two large, oval eyes sit on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopod
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 4,5 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melanophores
Chromatophores are cells that produce color, of which many types are pigment-containing cells, or groups of cells, found in a wide range of animals including amphibians, fish, reptiles, crustaceans and cephalopods. Mammals and birds, in contrast, have a class of cells called melanocytes for coloration. Chromatophores are largely responsible for generating skin and eye colour in ectothermic animals and are generated in the neural crest during embryonic development. Mature chromatophores are grouped into subclasses based on their colour (more properly "hue") under white light: xanthophores (yellow), erythrophores (red), iridophores (reflective / iridescent), leucophores (white), melanophores (black/brown), and cyanophores (blue). While most chromatophores contain pigments that absorb specific wavelengths of light, the color of leucophores and iridophores is produced by their respective scattering and optical interference properties. Some species can rapidly change colour through ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cymothoida
Cymothoida is the name of a suborder of isopod crustaceans with a mostly carnivorous or parasitic lifestyle. It contains more than 2,700 described species in four superfamilies. Members of the suborder are characterised by their specialised mouthparts which include a mandible with a tooth-like process which is adapted for cutting or slicing. Classification Cymothoida contains these superfamilies and families: *Superfamily Anthuroidea Leach, 1814 ** Antheluridae Poore & Lew Ton, 1988 ** Anthuridae Leach, 1814 ** Expanathuridae Poore, 2001 ** Hyssuridae Wägele, 1981 ** Leptanthuridae Poore, 2001 ** Paranthuridae Menzies & Glynn, 1968 *Superfamily Cymothooidea Leach, 1814 **Aegidae White, 1850 **Anuropidae Stebbing, 1893 ** Barybrotidae Hansen, 1890 **Cirolanidae Dana, 1852 ** Corallanidae Hansen, 1890 ** Cymothoidae Leach, 1818 **Gnathiidae Leach, 1814 ** Protognathiidae Wägele & Brandt, 1988 ** Tridentellidae Bruce, 1984 *Superfamily Cryptoniscoidea Kossmann, 1880 **Asconisc ... [...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] |
Old Seventh Leg Harriet Richardson
Old or OLD may refer to: Places *Old, Baranya, Hungary *Old, Northamptonshire, England *Old Street station, a railway and tube station in London (station code OLD) *OLD, IATA code for Old Town Municipal Airport and Seaplane Base, Old Town, Maine, United States People *Old (surname) Music *OLD (band), a grindcore/industrial metal group * ''Old'' (Danny Brown album), a 2013 album by Danny Brown * ''Old'' (Starflyer 59 album), a 2003 album by Starflyer 59 * "Old" (song), a 1995 song by Machine Head *''Old LP'', a 2019 album by That Dog Other uses * ''Old'' (film), a 2021 American thriller film *''Oxford Latin Dictionary'' *Online dating *Over-Locknut Distance (or Dimension), a measurement of a bicycle wheel and frame *Old age See also *List of people known as the Old * * *Olde, a list of people with the surname *Olds (other) Olds may refer to: People * The olds, a jocular and irreverent online nickname for older adults * Bert Olds (1891–1953), Australian rules ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fundulus Parvipinnis
The California killifish (''Fundulus parvipinnis'') is a type of killifish (Fundulidae) found along the coast of southern California and Baja California. Like the other members of the family, California killifish are small, no more than about 11 cm in length. The body is rather thick and oblong in shape, with almost no narrowing of the caudal peduncle, and a squarish tail fin. The pelvic fins are small, while the anal fin is long, with 11-13 rays. They are olive-green above, and a yellowish brown below; during breeding season, the back become dark brown, while the belly and paired fins become bright yellow. They are coastal fish, occurring in shallow bays, estuaries, marshes, and the lower parts of streams from Morro Bay south to Magdalena Bay in central Baja California. Between Goleta Slough and the Tijuana River they occur almost continuously, the frequency of wetlands being sufficient to allow free movement. They tolerate a wide range of salinities, oxygen levels, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligocottus Maculosus
The tidepool sculpin (''Oligocottus maculosus'') is a fish species in the sculpin family Cottidae that ranges from the Bering Sea to southern California. Individuals reach up to in length and are common in tidepools. Description The tidepool sculpin grows to a length of about and has a large head, tapering body, and spiny fins. It has a single pre-opercular spine and tufts of cirri on the top of the head but not on the body below the dorsal fin as the fluffy sculpin (''Oligocottus snyderi'') does. It varies considerably in colour, is often marbled in grey, brown and white, but may be reddish or greenish and can change colour rapidly so as to camouflage itself. Distribution and habitat The tidepool sculpin is found in the northeastern Pacific Ocean from the Bering Sea to southern California. Its depth range is from the intertidal zone down to about . It is tolerant of both brackish water and normal seawater. It is found higher up the shore and is more tolerant of warmer water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clinocottus Analis
The woolly sculpin (''Clinocottus analis'') is a species of marine ray-finned fish belonging to the family Cottidae, the typical sculpins. It is found in the eastern Pacific Ocean, where it occurs along the coastline of California and Baja California. Taxonomy ''Clinocottus analis'' was first formally described as ''Oligocottus analis'' in 1858 by the French ichthyologist Charles Frédéric Girard with its type locality given as Monterey, California. The genus ''Clinocottus'' has been resolved as paraphyletic or polyphyletic by some workers and that this species is apparently not closely related to the other species included in the genus. This species is the only species subgenus ''Clinocottus'' which was proposed as a genus by Theodore Gill in 1861. The specific name, ''analis'', refers to the anus, an allusion Girard did not explain, although he did describe this species as having the origin of the anal fin placed behind forward edge of the second dorsal fin. In 1898 it was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artedius Lateralis
''Artedius lateralis'', also known as the smoothhead sculpin or round-nosed sculpin, is a species of marine ray-finned fish belonging to the family Cottidae, the typical sculpins. The species, commonly found in the intertidal zone and to depths of 43 feet, is native to the northern Pacific, from Russia and the Bering Sea to Baja California. Growing to a length of 14 centimeters, it takes its name from the lack of scales on its head. References External links * Smoothhead Sculpin (''Artedius lateralis'')at the Encyclopedia of Life The ''Encyclopedia of Life'' (''EOL'') is a free, online encyclopedia intended to document all of the 1.9 million living species known to science. It is compiled from existing trusted databases curated by experts and with the assistance of non ... lateralis Fish described in 1854 Fish of the Pacific Ocean Taxa named by Charles Frédéric Girard {{Scorpaeniformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atherinops Affinis
The topsmelt silverside (''Atherinops affinis''), also known as the topsmelt, is a species of Neotropical silverside native to the eastern Pacific Ocean. Description The topsmelt silverside is a small, slim fish with a dorsally flattened body which can grow up to a total length of . It has two separate dorsal fins on its bright green back which contrasts with the silver to pale flanks and silvery underside. This species has a pointed head with small eyes and a rather rounded, blunt snout and an oblique mouth situated terminally with extendible jaws each equipped with a row of tiny forked teeth. Their gills are a golden-yellow. It has no lateral line but it has 63-65 scales where the lateral line would have been present. The first dorsal fine has 5-9 spines, the second dorsal fin has a single spine and 8-14 rays while the anal fin also has a single spine but has 19-25 rays and the pectoral fin has 13 rays. The juveniles are translucent and have three rows of pigmented scales on th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cymatogaster Aggregata
The shiner perch (''Cymatogaster aggregata'') is a common surfperch found in estuaries, lagoons, and coastal streams along the Pacific coast from Alaska to Baja California. It is the sole member of its genus. The shiner perch is also known as seven-eleven and shiner seaperch.https://www.collinsdictionary.com/us/dictionary/english/shiner-perch Shiner perches are similar to tule perches, deep-bodied with a dusky greenish back and silvery sides that have a pattern combining fine horizontal bars with three broad yellow vertical bars. Breeding males turn almost entirely black, the barred pattern being obscured by dark speckles. Shiner perches are distinguished from tule perches by having fewer dorsal fin spines, just 8–9 vs the 15–19 of the tule perch. The rayed part of the dorsal fin has 18 to 23 rays. The anal fin has 3 spines followed by 22–25 rays. They are one of the most common fish in the bays and estuaries of their range, favoring beds of eelgrass, and often accumulati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ectoparasite
Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is 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 honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the broomrapes. There are six major parasitic strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), trophicallytransmitted parasitism (by being eaten), vector-transmitted parasitism, parasitoidism, and micropredation. One major axis of classification concerns invasiveness: an endoparasite lives inside the host's body; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Isopod")
