本期内容简介

一个巨蚌一生中只有一次机会找到适合的家，
一旦把自己扣紧在礁石上，余生就在那儿度过了。
巨蚌能够长到巨大的规模，是由于摄取了居住在牠们组织当中的数十亿共生藻所制造出来的糖和蛋白质。
作为交换，巨蚌提供了一个安全的住所给共生藻，让海藻接触到阳光，进行光合作用。白天的时候，巨蚌会打开贝壳，露出多种颜色的内膜组织。
牠们也会利用虹吸管过滤海水，并进食一些路过的浮游生物。

A giant clam gets only one chance to find a nice home. Once it fastens itself to a spot on a reef, there it shall stay for the rest of its life.

Giant clams grow to their enormous size by consuming the sugars and proteins produced by the billions of algae that live amongst their tissues. In exchange, they offer the algae a safe home and regular access to sunlight for photosynthesis, basking by day below the water’s surface with their fluted shells open and their multi-coloured mantles exposed. They also use a siphon to draw in water to filter and consume passing plankton.