大砗磲

大砗磲（学名：Tridacna gigas），又称巨蚌、库氏砗磲，是最大型的双壳贝类动物。栖息于南太平洋和印度洋的珊瑚礁。最重可达200公斤，壳宽可达1.2公尺。

在传说中，巨蚌常被误解为“杀人蚌”或“食人蚌”，《美国海军潜水手册》甚至曾经详述如果被巨蚌所夹住要如何切断其内收肌脱困。然而事实上巨蚌并不特别有侵略性或特别危险，更不是肉食性贝类。巨蚌的确有能力合起双壳，但这是一种防御性行为。而且因为受到刺激关闭，牠必须先喷水，排出滤食中的海水，时间足足有10几秒之多，并非陷阱式的夹合。并没有任何记录能证明有过任何人类曾经因这种方式被受困。 **又叫五爪贝

Giant clam 大砗磲

Empty shell from the Aquarium Finisterrae in Spain

Tejido de T. gigas mostrando alta densidad de zooxantelas

The giant clam (Tridacna gigas), known as pā’ua in Cook Islands Māori, is a clam that is the largest living bivalve mollusk.

Tridacna gigas is one of the most endangered clam species. Antonio Pigafetta documented these in his journal as early as 1521. One of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian oceans, they can weigh more than 200 kilograms (440 lb), measure as much as 120 cm (47 in) across, and have an average lifespan in the wild of over 100 years. They are also found off the shores of the Philippines, where they are called "taklobo", and in the South China Sea in the coral reefs of Sabah (Malaysian Borneo). Tridacna gigas lives in flat coral sand or broken coral and can be found at depths of as much as 20 m (66 ft). Its range covers the Indo-Pacific, but populations are diminishing quickly and the giant clam has become extinct in many areas where it was once common. Tridacna maxima has the largest geographical distribution among giant clam species; it can be found off high- or low-elevation islands, in lagoons or fringing reefs. Its rapid growth rate is likely due to its ability to cultivate algae in its body tissue.

单词	Giant clam
释义	Giant clam 原声例句剑桥雅思听力全真试题 10（海外版） One of the more interesting mollusks to be found in the reefs is the giant clam. 在珊瑚礁内能找到的有趣的软体动物之一就是巨型蛤蚌。 TED演讲（视频版） 2023年3月合集 Unfortunately, giant clams are rather difficult to see in the wild. 不幸的是，在野外很难看到巨型蛤蜊。海底两万里-Twenty Thousand Leagues Under The Sea By leaving the pearl buried beneath the giant clam's mantle, he allowed it to grow imperceptibly. 他把珍珠埋在巨蛤的外套膜下，让它在不知不觉中生长。 TED演讲（音频版） 2017年9月合集 A story goes that a diver had lost his legs while trying to retrieve a pole from a giant clam. 有一个故事说，一名潜水员在试图从一只巨型蛤蜊身上取回一根竿子时失去了双腿。海底两万里（原版） By leaving the pearl buried beneath the giant clam's mantle, he allowed it to grow imperceptibly. With each passing year the mollusk's secretions added new concentric layers. 把这颗珍珠塞在那只车渠的衣膜里面，无形中这珠就可以渐渐大起来了。每年，那软体动物的分泌物都在环绕珍珠周围的薄膜上累积起来。海底两万里（原版） I estimated the weight of this giant clam at 300 kilograms. Hence such an oyster held fifteen kilos of meat, and you'd need the stomach of King Gargantua to eat a couple dozen. 我估计这只贝的重量有三百公斤。而这样一只贝可以有十五公斤的净肉，那就必须有一位卡冈都亚②的肚子才能眷食几打这样巨大的贝了。 Elllo INT4 I went on an introductory dive and I saw a giant clam that had a really spongy purple inside that I was able to touch and then the clam closed up really quickly. 我看到一个巨大的蛤蜊，里面有一个非常海绵状的紫色，我可以触摸到它，然后蛤蜊很快就合上了。中文百科大砗磲大砗磲（学名：Tridacna gigas），又称巨蚌、库氏砗磲，是最大型的双壳贝类动物。栖息于南太平洋和印度洋的珊瑚礁。最重可达200公斤，壳宽可达1.2公尺。在传说中，巨蚌常被误解为“杀人蚌”或“食人蚌”，《美国海军潜水手册》甚至曾经详述如果被巨蚌所夹住要如何切断其内收肌脱困。然而事实上巨蚌并不特别有侵略性或特别危险，更不是肉食性贝类。巨蚌的确有能力合起双壳，但这是一种防御性行为。而且因为受到刺激关闭，牠必须先喷水，排出滤食中的海水，时间足足有10几秒之多，并非陷阱式的夹合。并没有任何记录能证明有过任何人类曾经因这种方式被受困。 *又叫五爪贝英语百科 Giant clam 大砗磲 The giant clam (Tridacna gigas), known as pā’ua* in Cook Islands Māori, is a clam that is the largest living bivalve mollusk. Tridacna gigas is one of the most endangered clam species. Antonio Pigafetta documented these in his journal as early as 1521. One of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian oceans, they can weigh more than 200 kilograms (440 lb), measure as much as 120 cm (47 in) across, and have an average lifespan in the wild of over 100 years. They are also found off the shores of the Philippines, where they are called "taklobo", and in the South China Sea in the coral reefs of Sabah (Malaysian Borneo). Tridacna gigas lives in flat coral sand or broken coral and can be found at depths of as much as 20 m (66 ft). Its range covers the Indo-Pacific, but populations are diminishing quickly and the giant clam has become extinct in many areas where it was once common. Tridacna maxima has the largest geographical distribution among giant clam species; it can be found off high- or low-elevation islands, in lagoons or fringing reefs. Its rapid growth rate is likely due to its ability to cultivate algae in its body tissue.
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