A lancet is a medical instrument, similar to a scalpel but with a double-edged blade.
A lancet, also called Amphioxus, is a primitive member of the PhylumChordata in SubphylumCephalochordata. It superficially resembles a small fish in the shape of the medical instrument (above). They are frequently found buried in sand in warm, tropical waters and reach the size of five centimeters. See lancelet.
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