12 Nov, 2008
OLDEST ANIMAL TO DATE
Researchers found a clam off the coast of Iceland that’s between 405 and 410 years old and there might be some other there in the water that might be 600 years or over. They said:
The clams are born as larvae which drift through the oceans until they settle on to the seabed and begin to grow shells. Unlike scallops, they cannot propel themselves, but burrow down into the sea bed where they filter and feed on a constant rain of nutrient-rich phytoplankton.
The mollusc, which is thought to have lurked beneath the waves until at least the age of 405, would have been a juvenile when Galileo picked up his first telescope, Hamlet was first staged and the gunpowder plot failed to blow up King James I.The Arctica islandica clam was plucked from 80m-deep water by researchers at Bangor University in Wales, who were dredging the north Iceland shelf for the creatures. By studying their shells, the scientists hope to learn how the marine environment has changed in recent centuries.
The clam was alive when it was brought to the surface, but at that point, the researchers had no idea how old it was. Only after cutting through the shell and counting annual growth rings under a microscope did they date the mollusc to between 405 to 410 years old.
Marine biologists are unclear why the particular species of clam, Arctica islandica, is so long-lived. According to the Guinness Book of Records, the current claim for the oldest animal goes to another Arctica clam that lived for 220 years, though an unofficial record is held by yet another that lived to 374 years old. Link
