a clam recovered off the Iceland coast seems to be the longest-lived animal ever found:it is an ocean quahog clam aged 405 to 410.The animal's age was assessed by counting its shell rings,as the clam adds a new one each year.在冰岛海岸线附近发现了一个存活年龄达到405-410岁的一个圆蛤类生物,它是目前世界上发现的存活时间最长的生物.
