This section is from "The Domestic Encyclopaedia Vol3", by A. F. M. Willich. Amazon: The Domestic Encyclopaedia.
Plaise, or Pleuronectes platessa, L. a well-known fish, caught in numbers on the British and Dutch coasts; sometimes weighing 15 lbs.; though, in general, not exceeding eight or nine pounds.— The best and largest of these fish are taken off Rye, on the coast of Sussex.
Plaise differ from flounders, by their fiat size ; and having behind the left eye, a row of six tube-The upper part of the body and tins are of a deaf brown, marked with large bright orange-coloured spots ; and the belly is white. Ihey cast their spawn in. the beginning of February.
The flesh of plaise, while fresh, is equally tender, wholesome, and as easily digested as that of flounders ; but, if the former be kept for several days, it is supposed to become purgative, and is consequently detrimental to health.
 
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