crustaceans


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crustaceans

members of the class crustacea. Includes amongst the aquatic crustaceans, shrimp, prawn, yabby, crab, lobster. Many of them are now farmed commercially in enclosed waters.

parasitic crustaceans
small crustaceans or copepods are common parasites on the gills of aquarium and pond fish where they appear as white spots. The gills become obstructed and the fish die of anoxia.
References in periodicals archive ?
In 2013, Robert Elwood, a professor of animal behavior at Queen's University in Belfast, Northern Ireland, said there was evidence crustaceans - crabs, prawns, lobsters and other creatures - feel pain when boiled alive.
Parasitic crustaceans are increasingly serious problem in cultured fish and can infect wild populations.
But shrimps and crustaceans have totally different feeding habits and digestive systems than, for example, fish and AQUAVI Met-Met has been developed specially for them.
The details have been enshrined in legislation designed to simplify the management of the Welsh crustacean fishery.
Oliver Brown, Fish Culture Officer for NRW, said the crustaceans were reared at the Cynrig Fish Culture Unit, Powys, as part of a conservation strategy aiming to protect crayfish populations and establish safe havens for them.
Crustaceans and mollusks, also referred to as "shellfish," do not have a backbone or internal skeleton.
Chitin is a tough polysaccharide found in the shells of crustaceans.
Epibionts having crustaceans as hosts must be adapted to leave their host and to re-colonise the same or another substrate, after each moult (Utz and Coats, 2005).
This finding is based on exports from India of Fish Crustaceans, Molluscs and other Aquatic Invertebrates export data of InfodriveIndia.
He said that it appears to be the ground pattern from which others have evolved, asserting that different groups of crustaceans have vascular systems that have evolved into a variety of arrangements but they all refer back to what they see in Fuxianhuia.