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Rapana venosa
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THE CRIMES: Serious predator of bivalve mollusks including oysters, hard clams, razor clams, and mussels. Competes with native carnivorous snails (gastropods) such as the channelled whelk and the knobbed whelk for food; poses significant threat to native and commercially-grown shellfish. DESCRIPTION: Large, predatory snail; shell pale to very dark brown in color with visible black horizontal stripes or veins. Sharp pointed knobs; broad, flat, ridged columella; opercular opening is boxy, “D”-shaped, and orange or red in adults. Can grow as big as a softball, and live 10-15 years. The Interrogation
Where are you from?
Originally, I come from Asian waters, including the East China Sea and the Sea of Japan,
but I’ve been getting around, making my presence known. Hey, it only took 10-20 years after I put my foot
down in the Black Sea to wipe out a lot of the shellfish there. No pesky predators to bother us! We have had
to cut back a bit so we don’t eat ourselves completely out of food.
I understand youre found in the U.S. only in the Chesapeake Bay. How did you get there?
Wutta a place, the Chesapeake! Well, heh heh, I didn’t walk there, even if I am quick on my
foot. When our egg masses hatch, the young lads and lasses spend time as tiny zooplankton floatin’ in the
water. Sometimes they get sucked up with ballast water used to stabilize ships, and off they go! Never send a
postcard when they arrive, either. But I understand there are other U.S. coastal areas with the right salinity,
plenty of hard surfaces for our juveniles to play on, and a temperature range that’d make you smile, so we’re
hoping to spread out a bit.
How did you get the name "the Cutter"?
You must be talkin’ about my radula. It’s this ribbon-like structure, like a tongue,
but with rows of teeth. When I’m a hungry juvenile, I use it to drill holes in shells of young oysters
and clams, so I can eat the soft, yummy bodies inside. As an adult, I grab a clam with my foot
and either chip away at the shell edges with my radula
so I can apply a little textradoxin to paralyze the
tissues inside, or if I'm feeling patient, I play a
waiting game and hold that clam until it suffocates.
Either way, that baby is mine! Zip! I use my radula to
cut the muscles holding the shell together and tear out
the flesh. Dinner is served!
Reward:
The honor of protecting our water resources A healthier environment
and more opportunities to enjoy our natural areas.
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