Cockle (bivalve) in the context of "Bivalve"

Bivalvia (/baɪˈvælviə/) or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed by a calcified exoskeleton consisting of a hinged pair of half-shells known as valves. As a group, bivalves have no head and lack some typical molluscan organs such as the radula and the odontophore. Their gills have evolved into ctenidia, specialised organs for feeding and breathing.

Common bivalves include clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. Majority of the class are benthic filter feeders that bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as scallops and file shells, can swim. Shipworms bore into wood, clay, or stone and live inside these substances.

An aryballos (Greek: ἀρύβαλλος; plural aryballoi) was a small spherical or globular flask with a narrow neck used in Ancient Greece. It was used to contain perfume or oil, and is often depicted in vase paintings being used by athletes during bathing. In these depictions, the vessel is at times attached by a strap to the athlete's wrist or hung by a strap from a peg on the wall. Versions of the aryballos have been found throughout Greece but some of the more preserved versions have been found within the city of Athens.

There are two different versions of aryballoi, the Corinthian version and a version created by Attic potters. The Corinthian version of the aryballos has a rounded base and has one handle which reaches from the shoulder of the base to the lip. The version that was made by Attic potters usually is suited with two handles and has a "bell-shaped mouth". The Attic potter's aryballoi were produced sometime around the end of the 6th century while the Corinthian version of the aryballoi was produced up until the 5th century BC.

Pedro Luis Serrano, also referred to as Pedro de Serrano, was a 16th century Spanish sailor who was allegedly marooned for seven to eight years on a small desert island. Details of the story differ, but the most common version has him shipwrecked on a small island in the Caribbean off the coast of Nicaragua, sometime in the 1520s. Serrano survived by eating shrimp, cockles, and other animals he found washed up on the shore, and by collecting drinking water in sea turtle shells when it rained. When rainwater was unavailable, he also drank the blood of the turtles he had captured.

In some versions of the story, Serrano was joined by another Spanish castaway after three years on the island. Due to Serrano's isolation and unkempt state, both men initially mistook one another for the Devil, and quickly fled from each another. They reconciled when both men were able to invoke the name of Jesus Christ. The two men lived together on the island for about four years. They reportedly had a brief falling-out, in which each man isolated himself to one half of the island, but they were later re-reconciled.

Conchology (from Ancient Greek κόγχος (kónkhos) 'cockle' and -λογία (-logía) 'study of') is the study of mollusc shells. Conchology is one aspect of malacology, the study of molluscs; however, malacology is the study of molluscs as whole organisms, whereas conchology is confined to the study of their shells. It includes the study of terrestrial and freshwater mollusc shells, as well as seashells and extends to the study of a gastropod's operculum.

Conchology is now sometimes seen as an archaic study, because relying on only one aspect of an organism's morphology can be misleading. However, a shell often gives at least some insight into molluscan taxonomy, and historically the shell was often the only part of exotic species that was available for study. Even in current museum collections it is common for the dry material (shells) to greatly exceed the amount of material that is preserved whole in alcohol.

Cardium pottery or Cardial ware is a Neolithic decorative style that gets its name from the imprinting of the clay with the heart-shaped shell of the Cerastoderma glaucum, a member of the cockle family Cardiidae. These forms of pottery are in turn used to define the Neolithic culture which produced and spread them, commonly called the "Cardial culture".

The alternative name, impressed ware, is given by some archaeologists to define this culture, because impressions can be made with sharp objects other than cockle shells, such as a nail or comb. Impressed pottery is much more widespread than the Cardial. Impressed ware is found in the zone "covering Italy to the Ligurian coast" as distinct from the more western Cardial extending from Provence to western Portugal. The sequence in prehistoric Europe has traditionally been supposed to start with widespread Cardial ware, and then to develop other methods of impression locally, termed "epi-Cardial". However the widespread Cardial and Impressed pattern types overlap and are now considered more likely to be contemporary.

Coquina (/koʊˈkiːnə/) is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically sorted fragments of mollusks, trilobites, brachiopods, or other invertebrates. The term coquina comes from the Spanish word for "cockle" and "shellfish".

For a sediment to be considered to be a coquina, the particles composing it should average 2 mm (0.079 in) or greater in size. Coquina can vary in hardness from poorly to moderately cemented. Incompletely consolidated and poorly cemented coquinas are considered grainstones in the Dunham classification system for carbonate sedimentary rocks. A well-cemented coquina is classified as a biosparite (fossiliferous limestone) according to the Folk classification of sedimentary rocks.