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The horrifying truth behind the "horrifying clam" video

In a shocking twist, it's humans who are the real monsters.

A page from a 1908 biology textbook
A page from a 1908 biology textbook, showing all the other clams you probably want to torture to death.

You may have already seen the video below being passed around. It purports to show a clam eating salt, and is usually accompanied by a comment on the horrifying appearance of the shellfish. 

Certainly, it does look rather creepy; the long, pale tongue which sweeps the table is offputting, to say the least. But what is really horrifying is that you are actually watching the execution by torture of an animal which may be almost two centuries old. You monsters.

The first hint should be that the natural habitat of a clam is not someone's kitchen table. This clam has been cruelly kidnapped, and placed in the middle of a domestic environment which is as alien to it as the bottom of the ocean is to us. But some basic clam anatomy (clamatomy?) will tell you something else: clams don't have tongues.

Clams – indeed, almost all bivalves – are filter feeders. They brush water over their gills to capture plankton, which they then digest. What you are seeing the clam in the video extend is actually its foot, which is normally used to bury the bottom-dwellers beneath the ocean floor.

Obviously, this clam isn't going to dig itself particularly deep into the hardwood table which it has been placed on. As an inhabitant of the intertidal zone, it is used to being in the dry, and it thinks that what must be sand beneath is the safest place to be until it gets wet again. But when it extends its foot to dig, it hits salt. Have you ever rubbed salt in a wound, or poured salt on a slug? The inside of a clam is not much different; touching the salt is not something it likes to do. So it retracts its foot, and sits, waiting for the tide to come in, and hoping it isn't picked off by a seagull.

But there's one more shocking twist. Based on extensive wikipedia research years of clamology, I believe this to be a clam of the species Arctica islandica, commonly known as the Ocean Quahog, which can be found all along the east cost of the US. According to the National Oceanic and Atmospheric Administration, specimens have been known to live for 225 years.

This clam, dying an ignoble death in the kitchen of eBaum's World user "DataRapist", could have spoken to George Washington himself. Farewell, gentle clam.

Tags:nature