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A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer usually created by an animal or organism that lives in the sea. Most seashells are made by mollusks, such as snails, clams, and oysters to protect their soft insides. [1] Empty seashells are often found washed up on beaches by beachcombers.
Seashell in the sand. Seashell is an off-white color that resembles some of the very pale pinkish tones that are common in many seashells. The first recorded use of seashell as a color name in English was in 1926. [1] In 1987, "seashell" was included as one of the X11 colors. Cockle on the Shell Beach, Western Australia
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Conch are species of sea snail in the phylum Mollusca. Their shells consist of about 95% calcium carbonate and 5% organic matter. Conch are harvested for their edible meat and decorative shell.
The mechanical properties of bivalve shells and their relatedness to microstructure was first published in 1969 by Stephen Wainwright at Duke University. [2] Following this, eight main categories of bivalve microsections were defined: simple prismatic, composite prismatic, sheet nacreous, lenticular, foliated, crossed-lamellar, complex crossed-lamellar, and homogenous.
Discovered in 1993 off the coast of the Japanese island Kuroshima, Costasiella kuroshimae have been found in the waters near Japan, the Philippines, and Indonesia. They live in tropical climates. [3]
The shell of this species grows up to 2.5 inches in length. It has a rough surface with many spiral cords crossing many axial ribs, resulting in a lattice or beaded pattern.