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Published 1980
As a general rule, the fish in this book are shown swimming from right to left across the page. But it would be a solecism to show soles so doing. The reason is that flatfish, which belong to the Order Pleuronectiformes, have both eyes on the same side of the head; some (the sinistral flatfish) on the left side and some (the dextral flatfish) on the right. Dextral flatfish, for example soles, must therefore be portrayed swimming from left to right.