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Tonna galea, commonly known as the giant tun, is a species of marine gastropod mollusc in the family Tonnidae (also known as the tun shells). This very large sea snail or tun snail is found in the North Atlantic Ocean as far as the coast of West Africa, in the Mediterranean Sea and the Caribbean Sea.
The lion's paw can be 6.4 - 15.2 cm (2.5–6 in) long and are nearly circular. It has a moderately thick shell with flattened anterior wings near the hinge. In fact, the shell of the animal is very bright and is known for its thick and knobby texture. Their colors can range from red to orange; however, some appear purple and even yellow in hue.
Xenophoridae belongs to the superfamily Stromboidea, which also includes the true conchs (). [2] It had previously been placed in a monotypic superfamily, Xenophoroidea, [3] but placement in Stromboidea is supported by behavioral, [4] anatomical, [5] and genetic data. [6]
The shell of this mollusc species has special significance to shell collectors because it was once regarded as the rarest shell in the world. For about two centuries between its initial discovery and the discovery of its habitat in 1969, specimens were valued in the thousands of U.S. dollars and generally only owned by museums and wealthy private collectors.
The Bailey-Matthews National Shell Museum opened to the public in 1995, and operates as an information and reference center for national and international scientists, students, and shell enthusiasts, particularly those who are interested in the marine, terrestrial, and freshwater mollusks of the Gulf of Mexico and Florida.
Cassis tuberosa, the king helmet, is a species of very large sea snail with a solid, heavy shell, a marine gastropod mollusc in the family Cassidae, the helmet shells and their allies. [ 1 ] Distribution
Pinna nobilis, known by the common names noble pen shell and fan mussel, is a large species of Mediterranean clam, a marine bivalve mollusc in the family Pinnidae, the pen shells.
Piddocks are unique in that each side of their shells is divided into 2 or 3 separate sections. Furthermore, one of the piddock's shells has a set of ridges or "teeth", which they use to grind away at clay or soft rock and create tubular burrows.