Author: (Valenciennes, 1846)
Remark: Considered mostly as a subspecies in the literature.  Therefore the upraise at species rank here is considered as a provisionally accepted name, until more works are conducted on <i>P. argalus</i> susbepcies to fix their status.
Comments: Maximum length is body length.  Found close to the surface in shallow water.  Feeds mainly on small fishes.  Oviparous (Ref. 205).  Eggs may be found attached to objects in the water by tendrils on the egg's surface (Ref. 205).