Otolith description

Otolith large, oblong. Dorsal margin irregular; ventral margin slightly rounded and slightly sinuate; posterior margin irregular. Distal surface flat/concave; proximal surface convex. Sulcus groove medium, approximately homosulcoid; opening ostial, but may appear ostio-caudal. Colliculum heteromorph. Collum low and wall-like. Crista superior and crista inferior well developed and ridge-like along cauda. Rostrum broad and bluntly rounded. Excisura wide; notch shallow; angle wide. Dorsal area depression shallow oval. Ventral area depression absent, groove present and sculptured irregularly.

Otolith of Hypoplectrodes annulata from a fish of 202 mm TL
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