Physical Characteristics

Reaches lengths of 6.7 in (17 cm). Impact of its strike equals or exceeds that of H. ensigera. There is considerable sexual dichromatism. Mature males are brilliantly colored, with emerald green bodies and crimson and blue antennules and maxil-

lipeds; females are more cryptically colored with olive or brown. Juveniles are bright yellow. An odd feature is its telson, which is thin and weak, despite the strength of the predatory strike, which is so powerful that it can kill an individual in a confrontation between same-species rivals.

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