"progress away from or towards the hitched object. This knot is particularly useful where the length of the running end needs to be adjustable, since feeding in rope from either direction will loosen the knot to be tightened at a new position. With certain types of cord, the clove hitch can slip when loaded. In modern climbing rope, the clove hitch will slip to a point, and then stop slipping. With smaller diameter cords, after being heavily weighted it may become difficult to untie. It is also unreliable when used on a square or rectangular post, rather than round. The"
"Lavinia exilicauda The hitch (""Lavinia exilicauda"") is a cyprinid fish endemic to central California, and was once very common. The name is derived from the Pomoan word for this species. The hitch shape is deep and laterally compressed, with a small head, and a terminal mouth pointing upwards. They are generally silver all over; younger fish have a black spot at the base of the tail, losing it as they age, and becoming generally darker as well. The anal fin is noticeably longer than for other California minnows, with 11-14 rays, while the dorsal fin has 10-13 rays, and is"
"Clinidae Clinidae is a family of blennioids; perciform marine fish. Temperate blennies, the family ranges from the Atlantic, Pacific and Indian Oceans, in both the Southern and Northern Hemispheres. The family contains about 86 species in 20 genera, the 60-cm-long giant kelpfish (""Heterostichus rostratus"") being the largest; most are far smaller. With small cycloid scales, clinoid blennies may have a deep or slender build; some members of the family bear the name ""snake blenny"" and ""eel blenny"" for this reason. Dorsal spines outnumber soft rays; there are two spines in the anal fin. Like many other blennies, clinids possess whisker-like"
"Lavinia (fish) Lavinia is a genus of cyprinid fish consisting of one or two species native to western North America. While there is little doubt as to the membership of the hitch (""L. exilicauda""), the position of the closely related California roach is less clear. While FishBase, ITIS, and Taxonomicon all record it as ""Hesperoleucus symmetricus"" (and is the treatment taken here), Moyle observes hybrids of the two species are fertile, the genetic relationship is also close, and the older genus ""Lavinia"" should take precedence. The origin of the genus name is the mythological Lavinia, although the rationale is unclear."
"Lavinia (fish) Lavinia is a genus of cyprinid fish consisting of one or two species native to western North America. While there is little doubt as to the membership of the hitch (""L. exilicauda""), the position of the closely related California roach is less clear. While FishBase, ITIS, and Taxonomicon all record it as ""Hesperoleucus symmetricus"" (and is the treatment taken here), Moyle observes hybrids of the two species are fertile, the genetic relationship is also close, and the older genus ""Lavinia"" should take precedence. The origin of the genus name is the mythological Lavinia, although the rationale is unclear."
"grouped into 12 genera: Requiem shark Requiem sharks are sharks of the family Carcharhinidae in the order Carcharhiniformes. They are migratory, live-bearing sharks of warm seas (sometimes of brackish or fresh water) such as the spinner shark, the blacknose shark, the blacktip shark, the grey reef shark, the blacktip reef shark, and the Oceanic whitetip shark. The name may be related to the French word for shark, ""requin"", which is itself of disputed etymology. One derivation of the latter is from Latin ""requiem"" (""rest""), which would thereby create a cyclic etymology (""requiem-requin-requiem""), but other sources derive it from the verb"
"Sepioteuthis Sepioteuthis, commonly known as reef squids or oval squids, is a genus of pencil squid. Reef squids are easily recognizable by their large rounded fins that extend along almost the entire length of their mantles, giving them a superficial resemblance to cuttlefish. Three species are currently recognized, though ""S. australis"" and ""S. lessoniana"" are believed to be cryptic species complexes. An additional species, ""S. loliginiformis"", was described in 1828, but its validity is questionable. However, if the species turns out to be the same as ""S. australis"" or ""S. lessoniana"", ""S. loliginiformis"" would be the senior synonym and replace"
"while the pelvic fins on fish from Sumatra are entirely reddish orange. The fish is sexually dimorphic, with females being slightly plumper than males. In addition, the tips of the tail on the male curve inwards slightly, whereas the females have straight tips. The fish has a movable spine that lies in a groove below the eye, which may be extended as a defense mechanism. The spine may cause a painful wound, but is not venomous. It also may be used as a predation tool as it is set close to the mouth. Clown loaches are native to the islands"
"Rhinichthys Rhinichthys, known as the riffle daces, is a genus of freshwater fish in the carp family (Cyprinidae) of the order Cypriniformes. The type species is ""Rhinichthys atratulus"", the blacknose dace. ""Rhinichthys"" species range throughout North America. The genus contains eight living species, one of which (the loach minnow) is considered Vulnerable. It also includes the extinct Las Vegas dace, which was only first described in 1984 and had disappeared by 1986. The cheat minnow (""Pararhinichthys bowersi""), a natural hybrid of the longnose dace (""R. cataractae"") and the river chub (""Nocomis micropogon""), was formerly placed in this genus, but is"
"the younger name currently in use. Sepioteuthis Sepioteuthis, commonly known as reef squids or oval squids, is a genus of pencil squid. Reef squids are easily recognizable by their large rounded fins that extend along almost the entire length of their mantles, giving them a superficial resemblance to cuttlefish. Three species are currently recognized, though ""S. australis"" and ""S. lessoniana"" are believed to be cryptic species complexes. An additional species, ""S. loliginiformis"", was described in 1828, but its validity is questionable. However, if the species turns out to be the same as ""S. australis"" or ""S. lessoniana"", ""S. loliginiformis"" would"
"Amphiprioninae Clownfish or anemonefish are fishes from the subfamily Amphiprioninae in the family Pomacentridae. Thirty species are recognized: one in the genus ""Premnas"", while the remaining are in the genus ""Amphiprion"". In the wild, they all form symbiotic mutualisms with sea anemones. Depending on species, anemonefish are overall yellow, orange, or a reddish or blackish color, and many show white bars or patches. The largest can reach a length of , while the smallest barely achieve . Anemonefish are native to colder waters of the Indian and Pacific Oceans, including the Great Barrier Reef and the Red Sea. While most"
"Finch The true finches are small to medium-sized passerine birds in the family Fringillidae. Finches have stout conical bills adapted for eating seeds and often have colourful plumage. They occupy a great range of habitats where they are usually resident and do not migrate. They have a worldwide distribution except for Australia and the polar regions. The family includes species known as siskins, canaries, redpolls, serins, grosbeaks and euphonias. Many birds in other families are also commonly called ""finches"". These groups include: the estrildid finches (Estrildidae) of the Old World tropics and Australia; some members of the Old World bunting"
"Clown featherback The clown featherback, clown knifefish, or spotted knifefish, ""Chitala ornata"", is a nocturnal tropical fish with a long, knife-like body. This knifefish is native to freshwater habitats in Cambodia, Laos, Thailand and Vietnam, but it has also been introduced to regions outside its native range. It is one of world's most invasive species. It is often seen in aquaculture and the aquarium trade where frequently confused with ""Chitala chitala""; the latter species is very rare in the aquarium trade. Despite its popularity, the clown featherback reaches in length, outgrowing all but the largest aquaria. This species is native"
"Red Sea clownfish Amphiprion bicinctus, meaning ""both sawlike with two stripes,"" commonly known as the Red Sea or two-banded anemonefish is a marine fish belonging to the family Pomacentridae, the clownfishes and damselfishes. Like other species of the genus, the fish feeds on algae and zooplankton in the wild. Clownfish or anemonefish are fishes that, in the wild, form symbiotic mutualisms with sea anemones and are unaffected by the stinging tentacles of the host anemone, see . The sea anemone protects the clownfish from predators, as well as providing food through the scraps left from the anemone's meals and occasional"
"reef is made up of beds of rhodolith, various species of red algae, which superficially resemble coral. While it has been described as ""impoverished"", and ""not having the biodiversity of some of the more prominent coral reefs of the world"", 61 species of sponge and 73 species of fish, in addition to various coral and starfish species, have so far been identified as inhabiting the reef, including staghorn corals, and spiny lobsters. Pockets of coral species, discovered as early as 1999, were found to be similar to those found in the Caribbean Sea, hinting at the possibility that Caribbean corals"
"Requiem shark Requiem sharks are sharks of the family Carcharhinidae in the order Carcharhiniformes. They are migratory, live-bearing sharks of warm seas (sometimes of brackish or fresh water) such as the spinner shark, the blacknose shark, the blacktip shark, the grey reef shark, the blacktip reef shark, and the Oceanic whitetip shark. The name may be related to the French word for shark, ""requin"", which is itself of disputed etymology. One derivation of the latter is from Latin ""requiem"" (""rest""), which would thereby create a cyclic etymology (""requiem-requin-requiem""), but other sources derive it from the verb ""reschignier"" (""to grimace while"
"are both marine mammals (dolphins, whales) that use the park as a refuge and the different species of land mammals which are located mainly in the Chichiriviche Hill, among which are the brocket deer and caramerudo deer, the anteater, the crab-eating fox, howler monkey, sloth, opossum, paca, agouti and peccary cinched. Fish breeding in the park are grouper, snapper, curbina, tarpon, snook, toadfish, school shark, sardines, mackerel, grunt, the barracuda, black pacu and various fish that inhabit the coral reefs . Shellfish species are the mangrove oyster, sea hares, quigua, 2 types of lobsters (Panulirus argus, Panulirus grettatus), blue and"
"group of clownfish, a strict dominance hierarchy exists. The largest and most aggressive fish is female and is found at the top. Only two clownfish, a male and a female, in a group reproduce through external fertilization. Clownfish are sequential hermaphrodites, meaning that they develop into males first, and when they mature, they become females. They feed on mainly on planktonic copepods, algae, echiuroid and sipunculoid worms, and pelagic tunicates. Adults generally inhabit reef passages and slopes. They are oviparous, with distinct pairing during breeding. Eggs are demersal and adhere to the substrate. Males guard and aerate the eggs. The"
"while the outer reefs spawn in November and December. Its common soft corals belong to 36 genera. There are more than 1500 fish species in the reef systems. Five hundred species of marine algae or seaweed live on the reef, including thirteen species of the genus ""Halimeda"", which deposit calcareous mounds up to wide, creating mini-ecosystems on their surface which have been compared to rainforest cover. Crown-of-thorns starfish (""Acanthaster planci"") is the major predator of the reefs, as it preys upon coral polyps by climbing onto them, extruding its stomach over them, and releasing digestive enzymes to absorb the liquefied"
"been rather straightforward as regards the main clades contained therein. The common name is actually misleading however, as jawlessness is a primitive trait among leeches in general – most Arhynchobdellida are in fact jawless too. It is rather the proboscis that is the characteristic apomorphy of the Rhynchobdellida. Two or three families are recognized: The Glossiphoniidae are freshwater leeches, flattened, and with a poorly defined anterior sucker. The Piscicolidae occur in both freshwater and seawater, have cylindrical bodies, and a usually well-marked, bell-shaped, anterior sucker. The Ozobranchidae are not universally accepted as distinct; some authors prefer to merge them with"
"Bigfin reef squid Sepioteuthis lessoniana, commonly known as the bigfin reef squid or oval squid, is a commercially important species of loliginid squid. It is one of the three currently recognized species belonging to the genus ""Sepioteuthis"". Studies in 1993, however, have indicated that bigfin reef squids may comprise a cryptic species complex. The species is likely to include several very similar and closely related species. Bigfin reef squids are characterised by a large oval fin that extends throughout the margins of its mantle, giving them a superficial similarity to cuttlefish. They are small to medium-sized squids, averaging in length."
"of the family Ericaceae, which in Ireland can grow to be a forest tree, reaching heights of up to 15 metres. Its Irish name is ""caithne"". The lake shore and surroundings support several rare plant species, including yellow bird's-nest (""Monotropa hypopitys""), lady’s mantle (""Alchemilla glaucescens""), ivy broomrape (""Orobanche hederae""), black bryony (""Tamus communis""), intermediate wintergreen (""Pyrola media"") and bird's-nest orchid (""Neottia nidus-avis""). It is also home to the following rare or protected species: sea lamprey, river lamprey, brook lamprey, white-clawed crayfish, Atlantic salmon and otter. The Lough Gill water system gets a very early run of spring salmon. A small"
"Grey reef shark The grey reef shark (""Carcharhinus amblyrhynchos"", sometimes misspelled ""amblyrhynchus"" or ""amblyrhinchos"") is a species of requiem shark, in the family Carcharhinidae. One of the most common reef sharks in the Indo-Pacific, it is found as far east as Easter Island and as far west as South Africa. This species is most often seen in shallow water near the drop-offs of coral reefs. The grey reef shark has the typical ""reef shark"" shape, with a broad, round snout and large eyes. This species can be distinguished from similar species by the plain or white-tipped first dorsal fin, the"
"then an atoll – scientists have identified further reef types. While some sources find only three, Thomas and Goudie list four ""principal large-scale coral reef types"" – the fringing reef, barrier reef, atoll and table reef – while Spalding ""et al."" list five ""main types"" – the fringing reef, barrier reef, atoll, ""bank or platform reef"" and patch reef. A fringing reef, also called a shore reef, is directly attached to a shore, or borders it with an intervening narrow, shallow channel or lagoon. It is the most common reef type. Fringing reefs follow coastlines and can extend for many"
"Australian clownfish Amphiprion rubrocinctus, also known as the Australian clownfish or red anemonefish, is a species of anemonefish that is endemic to north west Australia. Like all anemonefishes it forms a symbiotic mutualism with sea anemones and is unaffected by the stinging tentacles of the host anemone. It is a sequential hermaphrodite with a strict sized based dominance hierarchy: the female is largest, the breeding male is second largest, and the male non-breeders get progressively smaller as the hierarchy descends. They exhibit protandry, meaning the breeding male will change to female if the sole breeding female dies, with the largest"
"of . It is similar in appearance to ""C. gymnorhinus"" and ""C. amblybregmatus"", both of which are sympatric species. All three species display sexual dimorphism, with the males displaying several secondary sex characteristics. Due to its diminutive size and the abundance of larger flatfishes, it is of no commercial importance, and is rarely collected. As a result, the fishes' morphology and ecology is known only from a limited number of collected samples. Citharichthys cornutus Citharichthys cornutus, the horned whiff, is a species of flatfish in the large-tooth flounder family Paralichthyidae. This bathydemersal marine fish inhabits the continental shelves of the"
"the lack of faint stripes on the back separate it from ""Chitala chitala""; a species it frequently has been confused with. Albinos and leucistic specimens are seen with some frequency in the aquarium trade. Juveniles lack the spots, but are overall striped. Their long anal fins are used to make graceful forward and backward movements. The clown knifefish grows to a fairly large size, up to and in the wild. It has two nasal tentacles above its large, toothed mouth. In the center of the body is a flaglike dorsal fin and has no ventral fins. Most clown knifefish are"
"wide. The sea always breaks over the reef and in good weather, breakers are visible up to away. The rocks consists of small-grained granite which is part of the larger Cornubian batholith. The batholith formed during the early Permian period, from about 300 to 275 Ma, at a late stage in the Variscan orogeny. Some of the stones have been given names and include Flat Ledge, Flemish Ledges, North-east Rocks, Pollard's Rock, South Rock and a ledge known as the Town. During the 1960s the reef was fished by a small fleet of French fishing vessels for crab, crayfish and"
"River shark Glyphis is a genus in the family Carcharhinidae, commonly known as the river sharks. This genus contains only three species. Further species could easily remain undiscovered, due to the secretive habits of ""Glyphis"" sharks. Their precise geographic range is uncertain, but the known species are documented in parts of South and Southeast Asia, New Guinea, and Australia. Of the three currently described species, the Ganges shark is restricted to fresh water, while the northern river shark and the speartooth shark are found in coastal marine waters, as well. The bull shark (""Carcharhinus leucas"") is sometimes called both the"
"have considerable salt tolerance, for instance occurring in Suisun Marsh (7-8 ppt salinity), and Salinas River lagoon (9 ppt). Their range includes the Sacramento River-San Joaquin River System of the Central Valley, the Russian River, Clear Lake, Pajaro River, and Salinas River. Although once abundant, but no longer commercially fished in Clear Lake, populations have been declining. The most likely cause appears to be loss of springtime spawning water flows due to water diversion and damming. Lavinia exilicauda The hitch (""Lavinia exilicauda"") is a cyprinid fish endemic to central California, and was once very common. The name is derived from"
"and standardized to its current form ""Rivière aux Feuilles"" in 1925. First known explorers: 1898 - Albert Peter Low 1912 - Robert J. Flaherty 1976 - Bob Davis The Leaf River caribou herd (LRCH) is a migratory forest-tundra ecotype of the boreal population, a caribou subspecies of Rangifer tarandus caribou. Like the George River Herd, it migrates between forest and tundra. Migratory caribou herds are often defined in terms of female natal philopatry or natal homing, the tendency to return to natal calving areas—in this case, the Leaf River. The Leaf Herd in the west, near the coast of Hudson"
"The rock cavies belong to the subfamily Caviinae along with the guinea pig, desert cavy, and cuis. Rock cavies are found in dry, rocky areas with low, scrubby vegetation, and they like to reside close to stony mountains and hills. In appearance and habits they closely resemble the unrelated rock hyrax of Africa (an example of convergent evolution). They usually shelter in crevices. They are reportedly seen at day and night, but are most active at dawn or dusk. Animals most active at this time are known as crepuscular. Studies show that there is a direct link between the retina"
"too late. The clown triggerfish has strong jaws for crushing and eating sea urchins, crustaceans and hard-shell molluscs. Its ventral (lower) surface has large, white spots on a dark background, and its dorsal (upper) surface has black spots on yellow. This is a form of countershading: from below, the white spots look like the lighted surface of the water above; and from above, the fish blends more with the coral reef below. The brightly painted yellow mouth may deter potential predators. Many reef fish species have evolved different feeding strategies accompanied by specialized mouths, jaws and teeth particularly suited to"