The four adult morphs in Paracerceis sculpta; females are monomorphic; a-males are largest possess elongated uropods and comprise 81% of aggregate male population samples, b-males are smaller than a-males, resemble females in their behavior and external morphology (although b-males are slightly smaller than females), invade spongocoels by mimicking female behavior and comprise 4% of aggregate male population samples; g-males are smallest, comprise 15% of aggregate male population and use their small size and rapid movements to invade spongocoels (From Shuster 1992).