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Bivalvia (/ b aɪ ˈ v æ l v i ə /) 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.
Freshwater bivalves are molluscs of the order Bivalvia that inhabit freshwater ecosystems. They are one of the two main groups of freshwater molluscs , along with freshwater snails . The majority of bivalve molluscs are saltwater species that live in the marine habitats , but a number of families have evolved to live in fresh water (and in some ...
A marine coastal ecosystem is a marine ecosystem which occurs where the land meets the ocean. Worldwide there is about 620,000 kilometres (390,000 mi) of coastline. Coastal habitats extend to the margins of the continental shelves, occupying about 7 percent of the ocean surface area.
Scallop (/ ˈ s k ɒ l ə p, ˈ s k æ l ə p /) [a] is a common name that encompasses various species of marine bivalve mollusks in the taxonomic family Pectinidae, the scallops.However, the common name "scallop" is also sometimes applied to species in other closely related families within the superfamily Pectinoidea, which also includes the thorny oysters.
Limnoperna fortunei, the golden mussel, is a medium-sized freshwater bivalve mollusc of the family Mytilidae.The native range of the species is China, but it has accidentally been introduced to South America and several Asian countries where it has become an invasive species.
This decoy moves in the current and attracts the attention of real fish. Some fish see the decoy as prey, while others see a conspecific , i.e. a member of their own species. Whatever they see, they approach for a closer look and the mussel releases huge numbers of larvae from her gills, dousing the inquisitive fish with her tiny, parasitic young.
Bivalve molluscs are used as bioindicators to monitor the health of aquatic environments in both fresh water and the marine environments. Their population status and structure, physiology, behaviour and their levels of contamination with chemicals together provide a detailed indication of the status of the ecosystem.
Plebidonax deltoides or Donax deltoides is a small, edible saltwater clam or marine bivalve mollusc, endemic to Australia. It belongs to the family of either the Donacidae, or the related Psammobiidae. It is most widely known as the pipi (also spelled pippi, plural pipis or pippies) in the eastern states of its native Australia.