It is a very colorful and beautiful shrimp on the average about 3-4 inches long. They posess a spine they "
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" small fish with and have a reputation for doing the same to aquarium glass- and sometimes breaking it. They have also been known to damage the aquariast's thumb if they get too close. Mainly cosidered a menace, they usually show up in live rock and make themselves known by rearranging LR and LS, eating smaller fish and shrimp, or the tell tale clicking after "lights out".