Abstract
The incidence of black discoloration was verified in the integumentary tissues of tails of spiny lobster Panulirus laevicauda (LATREILLE), collected at a local plant and a retail shop. As already indicated in the previous work, the relationship beween the stages of molting cycle and melanosis is statistically confirmed, and furthemore, sex has also been found to be differentially affected, females being more prone to discoloration than males. All lobsters in these samples were found to be injured and to be in the stages C and D. Appearances of black discoloration in the integumentary tissue were observed histologically on the epidermis in stage C and on the epicuticle in stage D, respectively, and being identified as melanin.
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