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Decorator Crabs
Decorator crabs are crabs of several different species, belonging to the superfamily Majoidea (not all of which are decorators), that use materials from their environment to hide from, or ward off, predators. They decorate themselves by sticking mostly sedentary animals and plants to their bodies as camouflage, or if the attached organisms are noxious, to ward off predators through aposematism. History In 1889, William Bateson observed in detail the way that decorator crabs fix materials on their backs. He noted that "the whole proceeding is most human and purposeful", and that if a ''Stenorhynchus'' crab is cleaned, it will "''immediately'' begin to clothe itself again with the same care and precision as before". In his ''The Colours of Animals'' (1890), Edward Bagnall Poulton classified protective animal coloration into types such as warning colours and protective mimicry. He included self decoration under the heading "Adventitious Protection", quoting Bateson's account of de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graceful Decorator Crab (Oregonia Gracilis)
Gracefulness, or being graceful, is the physical characteristic of displaying "pretty agility", in the form of elegant movement, poise, or balance. The etymological root of ''grace'' is the Latin word ''gratia'' from ''gratus'', meaning pleasing.Little, William; Fowler H.W.; Coulson J.; Onions, C.T. (Ed.): "Shorter Oxford English Dictionary on Historical Principals". Pub.: Oxford at the Clarendon Press (1968) Gracefulness has been described by reference to its being aesthetically pleasing. For example, Edmund Burke wrote: The difficulty in defining exactly what constitutes gracefulness is described in this analysis of Henri Bergson's use of the term: Gracefulness is often referenced by simile, with people often being described as being "as graceful as a swan", or "as graceful as a ballerina". The concept of gracefulness is applied both to movement, and to inanimate objects. For example, certain trees are commonly referred to as being "graceful", such as the '' Betula al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adaptive Coloration In Animals
''Adaptive Coloration in Animals'' is a 500-page textbook about camouflage, warning coloration and mimicry by the Cambridge zoologist Hugh Cott, first published during the Second World War in 1940; the book sold widely and made him famous. The book's general method is to present a wide range of examples from across the animal kingdom of each type of coloration, including marine invertebrates and fishes as well as terrestrial insects, amphibians, reptiles, birds and mammals. The examples are supported by many of Cott's own drawings, diagrams, and photographs. This essentially descriptive natural history treatment is supplemented with accounts of experiments by Cott and others. The book had few precedents, but to some extent follows (and criticises) Abbott Handerson Thayer's 1909 ''Concealing-Coloration in the Animal Kingdom''. The book is divided into three parts: concealment, advertisement, and disguise. Part 1, concealment, covers the methods of camouflage, which are colour re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelia Tumida
Pelia may refer to: * Pelpa or Pelīā, a village in Iran * Pelia, a Greek mythological figure * ''Pelia'' (crab), a genus of spider crabs in subfamily Pisinae of Epialtidae * ''Peria'' (butterfly) or ''Pelia'', a genus in subfamily Biblidinae Biblidinae is a subfamily of nymphalid butterflies that includes the tropical brushfoots. This subfamily was sometimes merged within the Limenitidinae, but they are now recognized as quite distinct lineages. In older literature, this subfami ... of nymphalid butterflies See also * Pella (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decorator Crab Covered In Anemones On Ianthella Basta (Elephant Ear Sponge)
{{Disambiguation ...
Decorator can refer to: * A house painter and decorator * Interior decoration * Decorator pattern in object-oriented programming * Function decorators, in Python * ''The Decorator'', a 1920 film starring Oliver Hardy * It is like an Interior Designer Interior design is the art and science of enhancing the interior of a building to achieve a healthier and more aesthetically pleasing environment for the people using the space. An interior designer is someone who plans, researches, coordina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velcro
Velcro, officially known as Velcro IP Holdings LLC and trading as Velcro Companies, is a British privately held company, founded by Swiss electrical engineer George de Mestral in the 1950s. It is the original manufacturer of hook-and-loop fasteners, which de Mestral invented. History Swiss electrical engineer George de Mestral invented his first touch fastener when, in 1941, he went for a walk in the Alps, and wondered why burdock seeds clung to his woolen socks and coat, and also his dog Milka. He discovered it could be turned into something useful. He patented it in 1955, and subsequently refined and developed its practical manufacture until its commercial introduction in the late 1950s. The fastener consisted of two components: a lineal fabric strip with tiny hooks that could 'mate' with another fabric strip with smaller loops, attaching temporarily, until pulled apart. Initially made of cotton, which proved impractical, the fastener was eventually constructed with nylon a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inachus
In Greek mythology, Inachus, Inachos or Inakhos (Ancient Greek: Ἴναχος) was the first king of Argos, Peloponnese, Argos after whom a river was called Inachos (river), Inachus River,Bibliotheca (Pseudo-Apollodorus), Apollodorus2.1.1/ref> that drains the western margin of the Argolis, Argive plain. Biography For modern scholars, Inachus is the most ancient god or hero of Argos. According to Robert Graves, he was a descendant of Iapetus (mythology), Iapetus while most modern mythologists understand Inachus as one of the river gods, all sons of Titan (mythology), Titans Oceanus and Tethys (mythology), Tethys and thus to the Greeks, part of the Twelve Olympians, pre-Olympian or "Pelasgian" mythic landscape. In Greek iconography, Walter Burkert notes, the Achelous, rivers are represented in the form of a bull with a human head or face. Although these myths have been passed down since then, one of the most remarkable findings of modern archaeology was the monuments and remains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antedon Rosaceus
''Antedon'' is a genus of free-swimming, stemless crinoids. The genus first appeared in the fossil record in the Cretaceous period. Characteristics Members of this genus have no stems but have five pairs of feathery arms arising from a central concave disc. There are a number of cirri or unbranched appendages on a low, cone-shaped dorsal ossicle, a bone-like structure in the centre of the disc. The mouth and the ambulacral grooves are also on the upper surface. Clawed cirri on the lower surface provide temporary attachment to the substrate. There is great variability in the morphological features in Antedonids found in different habitats and the main distinguishing feature among the species is the number of cirri. Species The following species are recognised in the World Register of Marine Species: *''Antedon arabica'' AH Clark & AM Clark *''Antedon bifida'' (Pennant, 1777) *''Antedon duebeni'' Böhlsche, 1866 *''Antedon mediterranea'' (Lamarck, 1816) *''Antedon nuttingi'' (AH ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crinoid
Crinoids are marine animals that make up the class Crinoidea. Crinoids that are attached to the sea bottom by a stalk in their adult form are commonly called sea lilies, while the unstalked forms are called feather stars or comatulids, which are members of the largest crinoid order, Comatulida. Crinoids are echinoderms in the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. They live in both shallow water and in depths as great as . Adult crinoids are characterised by having the mouth located on the upper surface. This is surrounded by feeding arms, and is linked to a U-shaped gut, with the anus being located on the oral disc near the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, in most crinoids the five arms are subdivided into ten or more. These have feathery pinnules and are spread wide to gather planktonic particles from the water. At some stage in their lives, most crinoids have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sertularia Abietina
''Sertularia'' is a genus of hydroids in the family Sertulariidae. Species The following species are recognized in the genus ''Sertularia'': *'' Sertularia albimaris'' Mereschkowsky, 1877 *Air Fern The air fern (''Sertularia argentea'') is a species of marine animal in the family Sertulariidae. It is also known as the sea fir and Neptune plant. These so-called "ferns" are dead and dried colonies of hydrozoans, colonies of marine hydroids ... (''Sertularia argentea'' Linnaeus, 1758) *'' Sertularia australis'' (Kirchenpauer, 1864) *'' Sertularia borneensis'' Billard, 1925 *'' Sertularia brashnikowi'' Kudelin, 1914 *'' Sertularia brunnea'' (Stechow, 1923) *'' Sertularia camtschatika'' Vinogradov, 1947 *'' Sertularia ceylonensis'' Stechow, 1921 *'' Sertularia conferta'' (Kirchenpauer, 1864) *'' Sertularia converrucosa'' Naumov, 1960 *'' Sertularia cupressina'' Linnaeus, 1758 *'' Sertularia cupressoides'' Clark, 1876 *'' Sertularia distans'' (Lamouroux, 1816) *'' Sertularia doh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrozoa
Hydrozoa (hydrozoans; ) are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genera within this class live in freshwater habitats. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria. Some examples of hydrozoans are the freshwater jelly (''Craspedacusta sowerbyi''), freshwater polyps ('' Hydra''), ''Obelia'', Portuguese man o' war (''Physalia physalis''), chondrophores (Porpitidae), "air fern" (''Sertularia argentea''), and pink-hearted hydroids (''Tubularia''). Anatomy Most hydrozoan species include both a polyp (zoology), polypoid and a medusa (biology), medusoid stage in their lifecycles, although a number of them have only one or the other. For example, ''Hydra'' has no medusoid stage, while ''Liriope tetraphylla, Lir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyas Araneus
The great spider crab, ''Hyas araneus'', is a species of crab found in northeast Atlantic waters and the North Sea, usually below the tidal zone. In 1986, two specimens were captured at the South Shetland Islands off the Antarctic Peninsula The Antarctic Peninsula, known as O'Higgins Land in Chile and Tierra de San Martín in Argentina, and originally as Graham Land in the United Kingdom and the Palmer Peninsula in the United States, is the northernmost part of mainland Antarctic ..., apparently transported by human agency. It has been feared that the species would have an adverse effect on the native fauna, but there have been no further captures from the region since the 1986 specimens. The great spider crab can moult and get rid of their outer shell/skin. This can take some time but it lets them grow to great size. After they moult they are very vulnerable to predators because of a very soft exoskeleton. References Majoidea Crabs of the Atlantic Ocean Crustacean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyastenus Elatus
''Hyastenus elatus'' is a species of crab Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the ... in the family Epialtidae. It is one of several decorator crabs, habitually covering itself in aposematic sponges which may also serve as camouflage. References Majoidea Crustaceans of the Pacific Ocean Crustaceans described in 1986 {{crab-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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