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Genus: Medialuna, Halfmoon Chubs


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D IX-XI, 22-27, spiny part much lower
teeth pointed

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MEDIALUNA

HALFMOON CHUBS

Body an elongate oval, compressed; small pointed head; mouth is small, horizontal and opens at the front; the top jawbone slips partially under the under-eye bone when the mouth is closed; teeth pointed, 1 row on each jaw; dorsal fin continuous, IX-XI spines that fold down into a scaly groove, 22-27 rays, spiny part much lower than soft part; tail fin concave; paired fins are relatively short; origin of the pelvics behind the base of the pectoral fin; scales small, thick and rough, covering the body, head (except forward of eyes) and soft portions of the median fins.

An antitropical, temperate eastern Pacific genus with 2 species, one of which enters the northern limits of our region.