Cardinal Shrimp Genders

From PlanetInverts:
"Sexing

Sexing of the Cardinal Shrimp is difficult and so far no one has fully figured out how to do so with the naked eye. The females have a saddle showing eggs underneath the carapace but the only way to actually see the saddle is with an infrared light. The outside shell of the Cardinal Shrimp is so dark that you cannot possibly see the saddle without special equipment. As far as using the principle of the other shrimps species, meaning females are larger and have a curved underbelly, does not apply to the Cardinal Shrimp unfortunately. Males and females seem to look exactly the same."

from this page:
http://www.planetinverts.com/Cardinal_Shrimp.html
 
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