prawn

a kind of animal – fresh and salt water – crustacean – related to the shrimp –long round body with two parts – head+thorax and abdomen – with mostly grey, brown, pink, white, blue, yellow, with a hard outer covering ‘exoskeleton’ – long antennae, round hard black eyes, branching gills, 5 pairs of legs (ten legs), flat tail; size: on average, 3 inches long, and weight: 13 grams (some species can grow up to 10 inches long and weigh up to 300 grams); feeds on (eats) [adults – filter feeders] very small plant matter and very small animals (plankton and zooplankton); lives for 4-5 years; found in all the fresh and salt waters of the world

prawn as food
Prawns, along with shrimps, are a major source of food in many parts or the world.
Prawns are said to be very nutritious, and are a popular item of food in many restaurants around the world!

prawn cocktail
The interesting feature of a prawn is that it changes sex, i.e. it spends the first part of its life as a male, and in the later part changes into a female!
Prawn cocktail is a popular food item – eaten as a starter!!
Though raw or live prawns come in different colours – grey, brown, green, blue, etc., they all change to pink colour when cooked!
to come the raw prawn over (or with) = to try to trick, outwit, etc.
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