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Hermit crabs inhabiting marine gastropod shells that lived in the Persian Gulf. A group of beachworn sea snail shells that vary in size, form and pattern combination. 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.
The shell is coiled, aragonitic, [22] nacreous and pressure-resistant, imploding at a depth of about 800 m (2,600 ft). The nautilus shell is composed of two layers: a matte white outer layer with dark orange stripes, [23] and a striking white iridescent inner layer. The innermost portion of the shell is a pearlescent blue-gray.
The Registry of World Record Size Shells is a conchological work listing the largest (and in some cases smallest) verified shell specimens of various marine molluscan taxa.A successor to the earlier World Size Records of Robert J. L. Wagner and R. Tucker Abbott, it has been published on a semi-regular basis since 1997, changing ownership and publisher a number of times.
The genus name Xenophora comes from two ancient Greek words and means "bearing (or carrying) foreigners". The shells are small to rather large (diameter of base without attachments 19–160 mm; height of shell 21–100 mm), depressed to conical, with narrow to wide, simple to spinose peripheral edge or flange separating spire from base.
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 ...
Crepidula fornicata is a species of medium-sized sea snail, a marine gastropod mollusc in the family Calyptraeidae, the slipper snails and cup and saucer snails.It has many common names, including common slipper shell, common Atlantic slippersnail, boat shell, quarterdeck shell, fornicating slipper snail, Atlantic slipper limpet and it is in Britain as the "common slipper limpet".
Olive snail. Olive snails, also known as olive shells and olives, scientific name Olividae, are a taxonomic family of medium to large predatory sea snails with smooth, shiny, elongated oval-shaped shells. [1] The shells often show various muted but attractive colors, and may be patterned also. They are marine gastropod molluscs in the family ...
Turritella (Torcula) Gray, 1847. Turritella (Zaria) Gray, 1847. Zaria Gray, 1847. Turritella is a genus of medium-sized sea snails with an operculum, marine gastropod mollusks in the family Turritellidae. [3] They have tightly coiled shells, whose overall shape is basically that of an elongated cone.