The Whelk
You may never have heard of a whelk, but this little ocean creature can ruin an oyster's day. The whelk has an appendage that works like a drill, with which it can bore a small hole in the top of an oyster's shell. Through this very small hole a whelk can devour an entire oyster, sucking it out little by little until the oyster is gone.
Today in the Word, February 3, 1997, p. 8