coup de grÃ¢ce in British English. See all translations. coup de grÃ¢cenoun [ S ] uk â /ËkuË dÉ ËÉ¡rÉËs/ us â /ËkuË dÉ ËÉ¡rÉËs/ formal. âº an action that ends something that has been gradually getting worse, or that kills a person or animal in order to end their suffering: Jane's affair was the coup de grÃ¢ce to her disintegrating marriage. Thesaurus: synonyms and related words.
Bivalves is a class of marine and freshwater molluscs with about 30,000 species including scallops, clams, oysters, razor shells, shipworms and mussels. Most bivalves are marine usually found in shallower water but some live in brackish and freshwater.
Gastropods. About 70 percent of mollusk species are gastropods. Common gastropods include snails, abalones, sea cucumbers and slugs. They all move by rippling the muscles in their stomach foot, which is what gastropod means.ivalves. Clams, limpets, mussels, oysters and scallops are the most common types of bivalves, which also are mollusks. Bivalve means two shells, which is what these creatures have instead of a bone structure. Bivalves are filter feeders.