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BiologyThe common shrimp feeds on a range of worms, molluscs and crustaceans. The sexes are thought to be separate, and the timing of breeding varies around the country (2). After mating, the female carries the eggs for 3-4 weeks in summer and up to 10 weeks in spring (2). The larvae, known as 'zoeae' are planktonic, and persist for around 5 weeks. Maturity is attained after 1-2 years, and average life span is 3 years (2). This species is predated upon by many species of fish, including cod (Gadus morhua) and whiting (Merlangius merlangus). If attacked, shrimps try to escape by means of rapid flicks of the tail (3).