A giant clam can live 100 years or more! The clam’s algae also produces metabolic waste products, which serve as a second nutritional source. Local fisher estimates put the age of this wavekin at over five score years. Due to the large size of the giant clam, there have been reports of giant clams eating human beings. This makes them the only species of clams unable … any of several huge clams of the family Tridacnidae, inhabiting the shallow waters of coral reefs in the tropical Indo-Pacific, as Tridacna gigas: some may weigh more than 500 lb. ➦ Giant clams are huge, sessile creatures, that inhabit the shallow areas of the marine coral reefs. There are thought to be 80,000 left in the wild! Tridacna is a genus of large saltwater clams, marine bivalve molluscs in the subfamily Tridacninae, the giant clams.They have heavy shells, fluted with 4 to 6 folds. Giant clams are also preyed upon by humans, who catch the giant clams in order to feed on a particular muscle which is seen as a culinary delicacy in many countries. Hernawan E. 2012. When an egg is release, this triggers nearby giant clams to swell their mantles and contract their adductor muscles. This phylum contains about 100,000 described species. They are members of the class of Bivalvia. Giant Clams reproduce in mid-summer, when the water is warm and food is extremely available. The excessive harvesting of giant clams by humans has led to rapid declines in the world’s giant clam population. Click through all of our Giant Clam images in the gallery. As the largest bivalve mollusc, the giant clam weighs a great average of 200kg. Giant Clams.....FINALLY Scientific Classification: Clams belong to the phylum Molusca. But otherwise; they are in the phylum Mollusca in the class Bivalvia, along with oysters. Giant clams are the largest living marine bivalves and typically inhabit tropical coral reefs in coastal regions throughout the Indo-Pacific. Among all known marine species, The mantle is brightly coloured. Unlike many of the well-travelled Reef creatures, the Giant Clam remains on the reef for its entire life. Mollusca makes the second largest phylum of non-chordate animals including snails, octopuses, sea slugs, squid, and bivalves such as clams, oysters, and mussels. More than 15,000 living species of bivalves are known, of which about 500 live in fresh water; the others occur in all seas. Website by bigfish.tv. The relationship between the giant clam and algae is considered a symbiotic, mutualistic relationship. The giant clam (Tridacna gigas), known as pā’ua in Cook Islands Māori, is a clam that is the largest living bivalve mollusk. What is a marble fox? Pelecypods can be abundant in the sediments of the C & D canal area. The giant clam may weigh over 500 lb (225 kg) and attain a length of over 4 ft (120 cm). It lays on the ocean floor, living at depth in broken coral or coral sand. They are related to molluscs and clams, but do not have a shell, but instead are left entirely unprotected and soft-bodied. [1945-50] * * * Universalium. Reputable marine manuals from centuries before warned against giant claims, detailing how a trapped diver could sever the clam and escape without drowning. Clam, in general, any member of the invertebrate class Bivalvia—mollusks with a bivalved shell (i.e., one with two separate sections). Donations of $2.00 or more are tax deductible in Australia provided they are made voluntarily and the donor receives no material benefit for the donation. Though giant clams are sedentary, they can open and close their shells. Giant clams have both male and female reproductive organs but are not thought to self-fertilise. Legends from the South Pacific tell of giant clams able to trap—and even devour—passing divers. The giant clam lives in flat coral sand or broken coral and can be found at depths of as much as 20 m (66 ft). Antonio Pigafetta documented these in his journal as early as 1521. This causes the clams to fill with water containing broadcasted sperm and eggs. Make an Impact. This vibrancy is an indicator of clam health—if the clam is unhealthy, the dying algae will bleach it to a bright white. When an egg is release, this triggers nearby giant clams to swell their mantles and contract their adductor muscles. As they cannot fertilise themselves, they reproduce through broadcast spawning. … which include animals in the taxonomic classes Polyplacophora (chitons), Gastropoda … with two shells – clams, mussels and oysters) and Cephalopoda (octopuses and squids). Giant clams are able to release more than 500 million eggs at a time. Once the giant clam has settled somewhere the giant clam remains there for the rest of its life. giant clam, common name for the largest bivalve mollusk in the world, Tridacna gigas, also known as the bear's paw clam. Giant clams, when healthy, can live up to 100 years. The largest giant clam ever discovered measured 137 centimetres and weighed around 250kg! This unique species is found to be a wide variety of colours, created by a contrast between algae inside the clam and the clam’s natural pigment. Giant clams are members of the Subfamily Tridacninae, which consists of two genera: Hippopus and Tridacna. Giant Clam (Tridacna squamosa) Tan, Leo W. H. & Ng, Peter K. L., 1988.A Guide to Seashore Life.The Singapore Science Centre, Singapore. In truth, giant clams are harmless to people. Giant clams are members of the Subfamily Tridacninae, which consists of two genera: Tridacna and Hippopus. Giant clams are hermaphroditic, producing both eggs and sperm. Look at other dictionaries: Giant clam — Giant Gi ant, a. Although giant clams are omnivorous animals and therefore eat a mixture of both plant and animal matter, the nutrients produced by the algae provide the main source of food for the giant clam. The Foundation is a registered Environmental Organisation in Australia and is eligible to receive tax deductible donations. As they cannot fertilise themselves, they reproduce through broadcast spawning. See how symbiotic relationships with algae allow them to thrive. Currently, 7 giant clam species are candidate species for listing under the E ndangered Species Act. An especially large giant clam. The giant clam larvae than begins to produce a shell and with just a few days, is big enough to find somewhere to settle on the sea floor. The giant clam is listed as vulnerable (population trend decreasing) on the International Union for Conservation of Nature’s Red List of Threatened Species. Cuttlefish belong to the phylum mollusca. Despite this though, no reports of man-eating giant clams have ever been verified as it is thought that the giant clam would simply hide in its shell rather than attack an approaching human. Watch Queue Queue Like a giant; extraordinary in size, strength, or power; as, giant brothers; a giant son. Clams, Snails, and Squid: Phylum Mollusca, Class Pelecypoda | … Let’s dive in! Clams, oysters, and scallops are well-known types. Giant Clams are part of the family Tridacnidae. The giant clam has falsely been called a “human killer”; no human death has ever been attributed to this animal. Giant clams are thought to grow to such enormous sizes due to the fact that giant clams consume a great deal of sugars and proteins that are produced by the algae that live on the giant clams. Learn more about the giant clam, the 500-pound mollusk that spends its life anchored to a reef. Conservation. The Foundation provides its donors with official receipts for Australian tax purposes. Giant clams are also known to eat small food particles and animals that are present in the surrounding water. Giant clams release eggs and sperm into the water, where the eggs will generally be fertilised by the sperm from another giant clam. Tridacna Clams, Giant Clams at Animal-World has facts about clams with research on clams covering types of clams, where to find clams, what do clams eat, clam shells, tridacnid propogation, baby clams, pictures of clams and their marine aquarium care Giant clams are filter feeders, taking in plankton through a large, central opening. Due to the aquarium trade and the fact that the giant clam’s abductor muscle is considered a delicacy, the giant clam population has decreased substantially. giant clam. A fully-grown giant clam can release over 500 million eggs in one go. Watch Queue Queue. Giant clams are so successful within their environment that it is not uncommon for these giant molluscs to live for more than 100 years! "Clam" is too broad for order, family, genus and species. Links. Giant clams are no myth. The clam’s bright colors are the result of the algae living inside its body. Kingdom Animalia: Phylum Arthropoda. By day, giant clams open their shells so that the algae inside them get a chance to photosynthesise. Gian © 2020 Great Barrier Reef Foundation. [Suitable for printing on extra large canvases.] Taxonomy of Indonesian giant clams (Cardiidae, Tridacninae). The giant clams are the members of the clam genus Tridacna that are the largest living bivalve mollusks. ➦ Owing to its sessile nature, the moment the giant clam chooses a spot as its ‘home’, it fastens itself to the same, and then cannot go elsewhere for the rest of its life. Giant Clam Phylum : MolluscaClass : BivalviaFamily : CardiidaeGenus : TridacnaSpecies : Tridacna gigas Sign up for free to create engaging, inspiring, and converting videos with Powtoon. Instead, they’re the offspring of red […] Read More, David Burnie, Dorling Kindersley (2011) Animal, The Definitive Visual Guide To The World's Wildlife, Tom Jackson, Lorenz Books (2007) The World Encyclopedia Of Animals, David Burnie, Kingfisher (2011) The Kingfisher Animal Encyclopedia, Richard Mackay, University of California Press (2009) The Atlas Of Endangered Species, David Burnie, Dorling Kindersley (2008) Illustrated Encyclopedia Of Animals, Dorling Kindersley (2006) Dorling Kindersley Encyclopedia Of Animals. This video is unavailable. Eels, snails, fish and starfish are all known to snack on small parts of the giant clam. They can be … A mollusk is an animal classified in the Phylum Mollusca. ➦ Adult giant clams cannot close their shells completely. (225 kg). ABN 82 090 616 443. Despite the vast size of the giant clam, giant clams are preyed upon by a number of marine predators, many of which are actually much smaller in size than the giant clam itself. 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