flounder

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flounder

members of the families Bothidae and Pleuronectidae; flatfish with eyes on the same side of the head.

flounder ulcer disease
progressive and sometimes fatal ulceration in greenback flounder and probably other species of flatfish. Caused by Aeromonas salmonicida. See also atypical aeromonassalmonicida.
References in classic literature ?
And this meant that she was going back toward Jerry floundering in the sea.
Inasmuch, then, as this Leviathan comes floundering down upon us from the head-waters of the Eternities, it may be fitly inquired, whether, in the long course of his generations, he has not degenerated from the original bulk of his sires.
I too had been groping and floundering, the while I thought I rode clear-eyed through the mystery.