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Tridacna is a genus of large saltwater clams, marine bivalve molluscs in the subfamily Tridacninae, the giant clams. Many Tridacna species are threatened. They have heavy shells, fluted with 4 to 6 folds. The mantle is often brightly coloured. They inhabit shallow waters of coral reefs in warm seas of the Indo-Pacific region. [2]
Tridacna gigas, the giant clam, is the best-known species of the giant clam genus Tridacna. Giant clams are the largest living bivalve mollusks. Several other species of "giant clam" in the genus Tridacna are often misidentified as Tridacna gigas. These clams were known to indigenous peoples of East Asia for thousands of years and the Venetian ...
Tridacna squamosa is a peaceful resident and does not harm other organisms, in the wild or otherwise. Despite its ability to shut completely, anemones, triggerfish, and puffers may be predators in a domestic environment. It is also recommended not to be kept with anemones as the anemone may move close to the clam and sting or eat it.
The maxima clam (Tridacna maxima), also known as the small giant clam, is a species of bivalve mollusc found throughout the Indo-Pacific region. [3]They are much sought after in the aquarium trade, as their often striking coloration mimics that of the true giant clam; however, the maximas maintain a manageable size, with the shells of large specimens typically not exceeding 20 centimetres (7.9 ...
Sometimes the giant clams are still treated as a separate family Tridacnidae, [1] but modern phylogenetic analyses included them in the family Cardiidae as a subfamily. [2] [3] Two recent genera and eight species are known: Hippopus—2 species; Tridacna—10 species; Recent genetic evidence has shown them to be monophyletic sister taxa. [4]
The shells should be closed. If any rogue clams are slightly open, gently tap the shell to test them. A dead clam will stay ajar, while a living one will retreat and close its shell. You should ...
The species is also known as the smooth giant clam because of the relative lack of ribbing and scales on its thick shell. The smoothness of the southern giant clam's shell and its six to seven vertical folds help to distinguish it from its larger relative, Tridacna gigas , which has four to five folds and a rougher texture.
Four views of a shell of the land snail Arianta arbustorum The giant clam (Tridacna gigas) is the largest extant species of bivalve. The mantle is visible between the open valves. A mollusc shell is formed, repaired and maintained by a part of the anatomy called the mantle. Any injuries to or abnormal conditions of the mantle are usually ...
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