The king scallop is a filter feeder, pumping water through a filter in the gill chamber to remove particulate organic matter and phytoplankton. They reach reproductive maturity at a minimum size of 60mm and are fully mature at 3-5 years, living up to 20 years. Maximum shell size varies with most being <150mm at the widest part of the shell. Sessile invertebrates, such as barnacles and tube worms often grow on the shells. Both are marked with up to 17 distinct radiating ribs. The lower (right) valve of the king scallop is convex and off-white in colour and the upper (left) valve is flat and reddish-brown. D&S IFCA Byelaw Book and Minimum Conservation Reference Size List.South Devon IPA - Trawling & Crabbing Chart.
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