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A snail is a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name snail is also used for most of the members of the molluscan class Gastropoda that have a coiled shell that is large enough for the animal to retract
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 .
Edible molluscs are harvested from saltwater, freshwater, and the land, and include numerous members of the classes Gastropoda (snails), Bivalvia (clams, scallops, oysters etc.), Cephalopoda (octopus and squid), and Polyplacophora (chitons). Many species of molluscs are eaten worldwide, either cooked or raw.
Schistosomiasis (also known as bilharzia, bilharziosis, or snail fever) is transmitted to humans by water snail hosts, and affects about 200 million people. Snails and slugs can also be serious agricultural pests, and accidental or deliberate introduction of some snail species into new environments has seriously damaged some ecosystems .
Shellfish include various species of molluscs, crustaceans, and echinoderms. In most parts of the world, fish are generally not considered seafood even if they are from the sea. In the US, the term "seafood" is extended to fresh water organisms eaten by humans, so any edible aquatic life may be broadly referred to as seafood in the US.
Nearly all seafood, including fish and shellfish, contains trace amounts of mercury from the surrounding water, which they absorb when they feed, per the U.S. Food and Drug Administration.
A city known for its snail culture is the town of Lleida, in the north-Spanish region of Catalonia, where the L'Aplec del Cargol festival has been held since 1980, receiving some 300,000 visitors during a weekend in May. [17] Snail were eaten periodically in Central-Europe sometimes, as food or medicine.
Living up to seven years, these beautifully decorated shellfish are mild-tempered and shy. Usually found in pairs, these night owls prefer to hide during the day and feed at night. 24. Ramshorn Snails