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Mantle of giant clam with light-sensitive spots, which detect danger and cause the clam to close. 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.
Tridacna clams can produce large white pearls with an undulating, porcelain-like surface, [16] which may be described as "non-nacreous pearls". [ citation needed ] The " Pearl of Lao Tzu ", also known as the "Pearl of Allah", is the world's largest pearl weighing 6.4 kilogrammes; it was said to have been found inside a Tridacna gigas by a ...
Tridacna squamosa, known commonly as the fluted giant clam and scaly clam, is a species of bivalve in the family Cardiidae. [ 1 ] [ 3 ] It is one of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian Oceans .
The Pearl of Lao Tzu was once considered the world's largest known pearl. The pearl was found by a Filipino diver in the Palawan sea, which surrounds the island of Palawan in the Philippines. It is not considered a gemstone pearl, but is instead known as a "clam pearl" or "Tridacna pearl" from a giant clam. It measures 24 centimeters in ...
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Tridacnidae – Giant clams Giant clam Tridacna squamosa (Northern KwaZulu-Natal to Mozambique) [2] Tridacna maxima (Zululand) [2] Mactridae – Trough shells Otter shell Lutraria lutraria (Namibia to Eastern Cape) [2] Smooth trough shell Mactra glabrata (Cape Columbine to Mozambique) [2] Angular surf clam Scissodesma spengleri (Cape Point to ...
The Pearl of Puerto, [1] also known as the Pearl of Puerto Princesa (Filipino: Perlas ng Puerto), [1] is an unauthenticated pearl [2] that was found in the Philippine Sea by a Filipino fisherman. It measures 2.2 feet (67 cm) long, 1 foot (30 cm) wide and weighs 34 kilograms (75 lb).
Because it did not grow in a pearl oyster it is not pearly; instead the surface is glossy like porcelain. Other pearls from giant clams are known to exist, but this is a particularly large one weighing 14 lb (6.4 kg). [28] The largest known pearl (also from a giant clam) is the Pearl of Puerto, also found in the Philippines by a fisherman from ...