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Starfish, such as the ochre sea star (Pisaster ochraceus) and the reef sea star (Stichaster australis), have become widely known as examples of the keystone species concept in ecology. The tropical crown-of-thorns starfish ( Acanthaster planci ) is a voracious predator of coral throughout the Indo-Pacific region, and the Northern Pacific ...
Lithopoma caelatum, common name the carved star shell, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails. [1] Distribution
Variety of Mollusc shells (gastropods: land snail shells and seashells). Closed and open shells of a marine bivalve, Petricola pholadiformis. A bivalve shell is composed of two hinged valves which are joined by a ligament. Four views of a shell of the land snail Arianta arbustorum The giant clam (Tridacna gigas) is the largest extant species of ...
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.
Anomia simplex is found throughout the year in shallow waters: typically estuaries, bays, or beaches, from the low tide water line all the way up to 30 feet deep. Common jingle shells are found coexisting in oyster beds and mollusk shells as far north as the coast of Nova Scotia, and as far south as the coast of Brazil. [2]
Two whole shells, one closed and one open, of the marine bivalve Abra alba Live marine venerid cockles, Austrovenus stutchburyi from New Zealand. A bivalve shell is the enveloping exoskeleton or shell of a bivalve mollusc, composed of two hinged halves or valves.
An instance of unidentified star jelly on Grimmia pulvinata, a species of moss. Star jelly (also called astromyxin, astral jelly) is a gelatinous substance sometimes found on grass and less commonly on the branches of trees. [1] According to folklore, it is deposited on the Earth during meteor showers.
Sand dollars (also known as sea cookies or snapper biscuits in New Zealand and Brazil, or pansy shells in South Africa) are species of flat, burrowing sea urchins belonging to the order Clypeasteroida.