Tag Archives: Giant clams

Amusing Monday: Mysterious shipworms brought back for study

The vessel, though her masts be firm,
Beneath her copper bears a worm….

Far from New England’s blustering shore,
New England’s worm her hulk shall bore,
And sink her in the Indian seas,
Twine, wine, and hides, and China teas.

Selected lines from “Though All the Fates,” Henry David Thoreau

Tall-masted wooden ships of a bygone era were often plagued by shipworms, which could turn a ship’s hull into something resembling swiss cheese. Many shipwrecks were blamed on structural weakness caused by shipworms, of which there are an amazing variety of species.

Shipworms are not actually worms but long, skinny clams. It turns out that the slimy mollusks are well known among residents of the Philippines, where the elongated clams are hunted in unusual places and eaten with delight. Stories of strange freshwater shipworms in the Philippines have been tracked down by researchers, who are making new discoveries about these ancient creatures.

In a research paper published last month, an international team of scientists reported on a shipworm that eats rocks. Like the shipworms that eat wood, this newly described species uses the shell at the end of its body for burrowing. The difference is that the rock-boring clam seems to grind up and digest rocks while excreting sandy fragments.

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