jackknife clam การใช้

Recently non-indigenous species have become established including the Pacific oyster and Atlantic jackknife clam.
The Atlantic jackknife clam is now also found in northwestern Europe, where it is regarded as a harmful exotic species.
"' Jackknife clam "'is a common name which is used for several species in the genera " Ensis " and " Pacific beaches of temperate North America.
The Atlantic jackknife clam has inspired a kind of biomimetic anchor in development by a team at the Massachusetts Institute of Technology, adapting the clam's digging method for use in keeping undersea cables and potentially watercraft anchored securely.
At low tide the position of the Atlantic jackknife clam is revealed by a keyhole-shaped opening in the sand; when the clam is disturbed, a small jet of water squirts from this opening as the clam starts to dig.