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Shellfish, in colloquial and fisheries usage, are exoskeleton-bearing aquatic invertebrates used as food, including various species of molluscs, crustaceans, and echinoderms. Although most kinds of shellfish are harvested from saltwater environments, some are found in freshwater .
A shed carapace of a lady crab, part of the hard exoskeleton Body structure of a typical crustacean – krill. The body of a crustacean is composed of segments, which are grouped into three regions: the cephalon or head, [5] the pereon or thorax, [6] and the pleon or abdomen. [7]
This species appears in prehistoric shellfish middens throughout Europe, and is believed to have been an important source of food since at least 7500 B.C.E. in Scotland. [23] [full citation needed] It is still collected in quantity in Scotland, mostly for export to the Continent and also for local consumption. The official landings figures for ...
The arm crown of modern nautilids (genera Nautilus and Allonautilus) is very distinct in comparison to coleoids.Unlike the ten-armed Decabrachia or the eight-armed Octopodiformes, nautilus may possess any number of tentacles (cirri) from 50 to over 90 tentacles depending on the sex and individual.
The spotted trunkfish is a member of the genus Lactophrys, a name which is a compound of lactaria, meaning a "milkcow", and ophrys, meaning "eyebrow", a reference to the spines above the eyes resembling the horns of a cow.
However, fish and shellfish containing higher levels of mercury may be harmful to an unborn baby or young child, per the FDA, which is why it's advised that pregnant women and children eat fish ...
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Many species of molluscs are eaten worldwide, either cooked or raw. Some mollusc species are commercially exploited and shipped as part of the international trade in shellfish; other species are harvested, sold and consumed locally. Some species are collected and eaten locally but are rarely bought and sold.