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Porpita Porpita
''Porpita porpita'', or the blue button, is a marine organism consisting of a colony of hydroids found in the warmer, tropical and sub-tropical waters of the Pacific, Atlantic, and Indian oceans, as well as the Mediterranean Sea and eastern Arabian Sea. It was first identified by Carl Linnaeus in 1758, under the basionym ''Medusa porpita''. In addition, it is one of the two genera under the suborder Chondrophora, which is a group of cnidarians that also includes ''Velella''. The chondrophores are similar to the better-known siphonophores, which includes the Portuguese man o' war, or ''Physalia physalis''. Although it is superficially similar to a jellyfish, each apparent individual is actually a colony of hydrozoan polyps. The taxonomic class, Hydrozoa, falls under the phylum Cnidaria, which includes anemones, corals, and jellyfish, which explains their similar appearances. Description The blue button can grow up to 30 mm in diameter and lives on the surface of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cnidaria
Cnidaria ( ) is a phylum under kingdom Animalia containing over 11,000 species of aquatic invertebrates found both in fresh water, freshwater and marine environments (predominantly the latter), including jellyfish, hydroid (zoology), hydroids, sea anemones, corals and some of the smallest marine parasites. Their distinguishing features are an uncentralized nervous system distributed throughout a gelatinous body and the presence of cnidocytes or cnidoblasts, specialized cells with ejectable flagella used mainly for envenomation and capturing prey. Their bodies consist of mesoglea, a non-living, jelly-like substance, sandwiched between two layers of epithelium that are mostly one cell (biology), cell thick. Cnidarians are also some of the few animals that can reproduce both sexually and asexually. Cnidarians mostly have two basic body forms: swimming medusa (biology), medusae and sessility (motility), sessile polyp (zoology), polyps, both of which are radially symmetrical with mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porpita Porpita, Omata, New Zealand Imported From INaturalist Photo 206228967
''Porpita'' is genus of hydrozoans in the family Porpitidae. It has two species recognized and is the type genus of its family. ''Porpita'' is in the phylum Cnidaria Cnidaria ( ) is a phylum under kingdom Animalia containing over 11,000 species of aquatic invertebrates found both in fresh water, freshwater and marine environments (predominantly the latter), including jellyfish, hydroid (zoology), hydroids, .... Similar to the well-known Portuguese Man-of-War, species in this genus consist mainly of colonies of hydrozoans, linked to a biological float, keeping them near the surface. Unlike the Man-of-War, however, the porpita lacks a sail and therefore does not get blown ashore as often. Organisms from this genus reside in tropical to sub-tropical waters all around the world. Like other cnidarians, they possess stinging cells called cnidoblasts. The most common species of this genus is the ''Porpita porpita'', more commonly known as the "Blue Button Jellyfish." Often washi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porpitidae
The chondrophores or porpitids are a small group of hydrozoans in the family Porpitidae. Though it derives from an outdated name for this lineage, some find the term ''chondrophore'' still useful as a synonym for members of the family Porpitidae – ''porpitids'' – when discussing the two genera contained in '' Porpita'' and ''Velella'', to avoid confusion with the near-identical genus name '' Porpita''. They all live at the surface of the open ocean, and are colonies of carnivorous, free-floating hydroids. The chondrophores look like a single organism, but are actually colonial animals, made up of orderly cooperatives of polyps living under specialized sail-structures. The colony's role in the plankton community is similar to that of pelagic jellyfish. The most familiar members of the family Porpitidae are the blue button ('' Porpita porpita'') and the by-the-wind sailor (''Velella velella''). Description The tiny individual animals are specialized to perform specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carangoides Malabaricus
The Malabar trevally (''Carangoides malabaricus''), also known as the Malabar jack, Malabar kingfish or nakedshield kingfish, is a species of large :wiktionary:inshore, inshore ocean, marine fish of the jack Family (biology), family, Carangidae. It is distributed throughout the Indian Ocean, Indian and west Pacific Oceans from South Africa in the west to Japan and Australia in the east, inhabiting reefs and sandy bays on the continental shelf. The Malabar trevally is similar to many of the other species in the genus ''Carangoides'', with the number of gill rakers and the grey-brown colour of the tongue being the diagnostic features. The Malabar trevally is a predator, taking a variety of small fish, cephalopods and crustaceans. The species is of minor economic importance throughout its range, caught by a variety of net and handline methods. Taxonomy and naming The Malabar trevally is one of 21 species in the genus ''Carangoides'' which falls into the jack and horse mackerel family ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copepoda
Copepods (; meaning 'oar-feet') are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (living in the water column), some are benthic (living on the sediments), several species have parasitic phases, and some continental species may live in limnoterrestrial habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests, bogs, springs, ephemeral ponds, puddles, damp moss, or water-filled recesses of plants ( phytotelmata) such as bromeliads and pitcher plants. Many live underground in marine and freshwater caves, sinkholes, or stream beds. Copepods are sometimes used as biodiversity indicators. As with other crustaceans, copepods have a larval form. For copepods, the egg hatches into a nauplius form, with a head and a tail but no true thorax or abdomen. The larva molts several times until it resembles the adult and then, after more molts, achieves adult development. The nauplius form is so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Broadcasting Corporation
The Australian Broadcasting Corporation (ABC) is Australia’s principal public service broadcaster. It is funded primarily by grants from the federal government and is administered by a government-appointed board of directors. The ABC is a publicly-owned statutory organisation that is politically independent and accountable; for example, through its production of annual reports, and is bound by provisions contained within the Public Interest Disclosure Act 2013 and the Public Governance, Performance and Accountability Act 2013, with its charter enshrined in legislation, the ''Australian Broadcasting Corporation Act 1983''. ABC Commercial, a profit-making division of the corporation, also helps generate funding for content provision. The ABC was established as the Australian Broadcasting Commission on 1 July 1932 by an Act of Federal Parliament. It effectively replaced the Australian Broadcasting Company, a private company established in 1924 to provide programming for A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaucus Marginatus
''Glaucus marginatus'' is a species of small, floating, blue sea slug; a pelagic (open-ocean) aeolid nudibranch; a marine opisthobranch gastropod mollusc in the family Glaucidae.Valdés A. & Campillo O.A. (2004) ''Systematics of pelagic aeolid nudibranchs of the family Glaucidae (Mollusca, Gastropoda)''. Bulletin of Marine Science 75(3): 381–38/ref> This species is closely related to ''Glaucus atlanticus'', and is part of a species complex (Informal clade Marginatus) along with '' Glaucus bennettae'', '' Glaucus thompsoni'', and '' Glaucus mcfarlanei''.Churchill C.K.C, Valdés A. & Ó Foighil D. (2014) ''Molecular and morphological systematics of neustonic nudibranchs (Mollusca : Gastropoda : Glaucidae : Glaucus), with descriptions of three new cryptic species''. Invertebrate Systematics 28(2): 174-19/ref> Like ''Glaucus atlanticus'', it is commonly known as a Glaucus atlanticus, blue dragon. Description This nudibranch is dark blue, and in many ways it resembles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Janthina
''Janthina'' is a genus of small to medium-sized pelagic or planktonic sea snails, marine gastropod molluscs in the family Epitoniidae.Gofas, S. (2011). Janthina Röding, 1798. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138092 on 2011-11-01 Distribution Species in this genus occur worldwide in tropical, subtropical and warm seas. Description These snails are pelagic and live at the surface of the ocean. Adult snails may not be capable of swimming, and die when they are detached from their rafts; '' Janthina janthina'' larvae, however, actively swim in the water column. The adult snails prey upon (and live near to) one of several species of pelagic animals loosely known as jellyfish. More specifically they eat the medusae of free-swimming Cnidaria, in particular the genus known as "by-the-wind sailors", ''Velella''. The snails are able to float securely because they create a raft of clear chitin around air bubb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaucus Atlanticus
''Glaucus atlanticus'' (common names include the blue sea dragon, sea swallow, blue angel, blue glaucus, dragon slug, blue dragon, blue sea slug, and blue ocean slug) is a species of sea slug in the family Glaucidae. These sea slugs live in the pelagic zone (open ocean), where they float upside-down by using the surface tension of the water to stay afloat. In addition, they have a gas bubble in their stomach that makes them easier to float. They are carried along by the winds and ocean currents. ''G. atlanticus'' makes use of countershading; the blue side of their bodies faces upwards, blending in with the blue of the water. The silver/grey dorsal side of the sea slug faces downwards, blending in with the sunlight reflecting on the ocean's surface when viewed from below the surface of the water. ''G. atlanticus'' feeds on other pelagic creatures, including the Portuguese man o' war and other venomous siphonophores. This sea slug stores stinging nematocysts from the siphono ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neuston
Neuston, also called pleuston, are organisms that live at the surface of a body of water, such as an ocean, estuary, lake, river, wetland or pond. Neuston can live on top of the water surface or submersed just below the water surface. In addition, microorganisms can exist in the surface microlayer that forms between the top- and the under-side of the water surface. Neuston has been defined as "organisms living at the air/water interface of freshwater, estuarine, and marine habitats or referring to the biota on or directly below the water’s surface layer." Neustons can be informally separated into two groups: the phytoneuston, which are autotrophs floating at the water surface including cyanobacteria, filamentous algae and free-floating aquatic plant (e.g. mosquito fern, duckweed and water lettuce); and the zooneuston, which are floating heterotrophs such as protists (e.g. ciliates) and metazoans (aquatic animals). This article mainly concerns with metazoan zooneustons. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nematocysts
A cnidocyte (also known as a cnidoblast) is a type of cell containing a large secretory organelle called a ''cnidocyst'', that can deliver a sting to other organisms as a way to capture prey and defend against predators. A cnidocyte explosively ejects the toxin-containing cnidocyst which is responsible for the stings delivered by a cnidarian. The presence of this cell defines the phylum Cnidaria, which also includes the corals, sea anemones, hydrae, and jellyfish. Cnidocytes are single-use cells that need to be continuously replaced. Structure and function Each cnidocyte contains an organelle called a cnidocyst, which consists of a bulb-shaped capsule and a hollow, coiled tubule that is contained within. Immature cnidocytes are referred to as cnidoblasts or nematoblasts. The externally oriented side of the cell has a hair-like trigger called a cnidocil, a mechano-chemical receptor. When the trigger is activated, the tubule shaft of the cnidocyst is ejected and, in the case ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wayback Machine
The Wayback Machine is a digital archive of the World Wide Web founded by Internet Archive, an American nonprofit organization based in San Francisco, California. Launched for public access in 2001, the service allows users to go "back in time" to see how websites looked in the past. Founders Brewster Kahle and Bruce Gilliat developed the Wayback Machine to provide "universal access to all knowledge" by preserving archived copies of defunct web pages. The Wayback Machine's earliest archives go back at least to 1995, and by the end of 2009, more than 38.2 billion webpages had been saved. As of November 2024, the Wayback Machine has archived more than 916 billion web pages and well over 100 petabytes of data. History The Internet Archive has been archiving cached web pages since at least 1995. One of the earliest known pages was archived on May 8, 1995. Internet Archive founders Brewster Kahle and Bruce Gilliat launched the Wayback Machine in San Francisco, California ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
