n. A New Zealand fish, Ammotretis guntheri. Also called lemon-sole or yellowbelly.n. One of the larger flatfishes, Psetta maxima (formerly Rhombus maximus), belonging to the family Pleuronectidæ.n. In the United States, one of several large flounders more or less resembling the above, as Bothus maculatus, the sand-flounder or window-pane of the Atlantic coast, more fully called spotted turbot, and Hypopsetta guttulata, the diamond flounder of California.n. The file-fish.n. The trigger-fish.