| Lopha cristagalli | |
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| Live specimen of Lopha cristagalli | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Ostreida |
| Family: | Ostreidae |
| Genus: | Lopha |
| Species: | L. cristagalli |
| Binomial name | |
| Lopha cristagalli | |
| Synonyms | |
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Lopha cristagalli, the cockscomb oyster, is a species of marine bivalve molluscs in the family Ostreidae.
The cockscomb oyster has a shell reaching a maximum diameter of about 20.5 cm, commonly 10 cm. It has a variable coloration, dark to light purple, and it is a thick, strongly ribbed, and slightly inequivalve shell. The shell inside is porcelaneous, usually purplish-brown or whitish in colour. The margins of the valves have a characteristic zig-zag pattern. The surfaces of both valves have many small, low, and rounded protuberances. These molluscs are stationary epifaunal suspension feeders, as they feed filtering sea water to extract the nutrients.
This species is widespread in the Indo-West Pacific, from East Africa, including Madagascar, Mauritius, the Red Sea, Seychelles, and the Persian Gulf, to Micronesia; north to Japan and south to Papua New Guinea and Indonesia. It lives on coral reefs in shallow subtidal waters at depths of 5 to 30 m.
Oyster is the common name for a number of different families of salt-water bivalve molluscs that live in marine or brackish habitats. In some species, the valves are highly calcified, and many are somewhat irregular in shape. Many, but not all oysters are in the superfamily Ostreoidea.
Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. Bivalves as a group have no head and they lack some usual molluscan organs like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances.
The Ostreidae, the true oysters, include most species of molluscs commonly consumed as oysters. Pearl oysters are not true oysters, and belong to the order Pteriida.
Atrina fragilis, the fan mussel, is a species of large saltwater clam, a marine bivalve mollusc in the family Pinnidae, the pen shells.
A mollusc valve is each articulating part of the shell of a mollusc. Each part is known as a valve or in the case of chitons, a "plate". Members of two classes of molluscs: the Bivalvia (clams) and the Polyplacophora (chitons) have valves.
Cliona californiana, the yellow boring sponge, boring sponge or sulphur sponge, is a species of demosponge belonging to the family Clionaidae. It is native to the north-eastern Pacific Ocean and burrows into the shell valves of bivalve molluscs.
A bivalve shell is part of the body, the exoskeleton or shell, of a bivalve mollusk. In life, the shell of this class of mollusks is composed of two hinged parts or valves. Bivalves are very common in essentially all aquatic locales, including saltwater, brackish water, and freshwater. The shells of bivalves commonly wash up on beaches and along the edges of lakes, rivers, and streams. Bivalves by definition possess two shells or valves, a "right valve" and a "left valve", that are joined by a ligament. The two valves usually articulate with one another using structures known as "teeth" which are situated along the hinge line. In many bivalve shells, the two valves are symmetrical along the hinge line—when truly symmetrical, such an animal is said to be equivalved; if the valves vary from each other in size or shape, inequivalved. If symmetrical front-to-back, the valves are said to be equilateral, and are otherwise considered inequilateral.
Isognomon alatus, the flat tree oyster, is a species of bivalve mollusc in the family Isognomonidae. It can be found along the Atlantic coast of North America, ranging from southern Florida to Brazil and Bermuda.
Pteria colymbus, the Atlantic winged oyster, is a species of bivalve mollusc in the family Pteriidae. It can be found along the Atlantic coast of North America, ranging from North Carolina to Bermuda and Brazil.
Spondylus americanus, the Atlantic thorny oyster, is a species of bivalve mollusc. It can be found along the Atlantic coast of North America, ranging from North Carolina to Brazil.
Pododesmus patelliformis, the ribbed saddle-oyster, is a species of bivalve mollusc in the family Anomiidae. It is found in the north east Atlantic Ocean.
Saccostrea cucullata, the hooded oyster or Natal rock oyster, is a species of rock oyster found mainly in the Indo-Pacific Ocean.
Spondylus gaederopus is a species of marine bivalve mollusc, a thorny oyster in the family Spondylidae. This species is endemic to the Mediterranean Sea.
Ostrea equestris, commonly known as the crested oyster or horse oyster, is a species of bivalve mollusc in the family Ostreidae. It can be found along the Atlantic coast of North and South America, ranging from Virginia to Patagonia.
Pinctada mazatlanica is a species of tropical marine bivalve mollusc in the family Pteriidae, the pearl oysters. It is known by the English common names pearl oyster, Mazatlan pearl oyster, and Panama pearl oyster. Spanish common names include madre perla, and ostra perlifera panameña. This mollusc was first described to science in 1856 by conchologist Sylvannus Charles Thorp Hanley. Pinctada mazatlanica produces gem-quality pearls and was the basis of a pearling industry in the Gulf of California for centuries.
Pinctada fucata, the Akoya pearl oyster (阿古屋貝), is a species of marine bivalve mollusc in the family Pteriidae, the pearl oysters. Some authorities classify this oyster as Pinctada imbricata fucata. It is native to shallow waters in the Indo-Pacific region and is used in the culture of pearls.
Pteria penguin, commonly known as the penguin's wing oyster, is a species of marine bivalve mollusc in the family Pteriidae, the pearl oysters. It is native to the western and central Indo-Pacific region and is used for the production of cultured pearls. The generic name comes from Greek πτερον (pteron) meaning wing.
Neopycnodonte is a genus of marine bivalve molluscs belonging to the family Gryphaeidae.
Octopus tehuelchus, commonly known as the Patagonian octopus, is a species of octopus, a marine cephalopod mollusc of the order Octopoda. It is native to shallow waters in the subtropical southwestern Atlantic Ocean. It was first described in 1834 by the French naturalist Alcide d'Orbigny.
Lasaea rubra is a species of small marine bivalve mollusc in the family Lasaeidae. It is found on the eastern side of the Atlantic Ocean. This species was first described in 1803 by the English naturalist George Montagu who gave it the name Cardium rubrum. It was later transferred to the genus Lasaea, making it Lasaea rubra.
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