The relationship of length-weight and width-weight of the carapace and the relative condition factor of mud crab Scylla serrata from Coringa Wildlife Sanctuary (Andhra Pradesh, India) was the subject of present study. Significant difference in both males and females was observed between carapace length-weight and carapace width-weight, with a linear relationship.The regression values of both genders were found to be statistically significant. The regression equations calculated for lengthweight were W = 0.00000178 L 3.1139 (r = 0.95) for males, W = 0.00000520 L 2.8056 (r = 0.94) for females and for genders combined it was W = 0.0000297 L 2.9891 (r = 0.94). In case of carapace width-weight relationship of males, females and genders combined the regression equations were W = 0.00000121 CW 3.0426 (r = 0.92), W = 0.00000178 CW 2.775 (r = 0.93) and W = 0.00000204 CW 2.9210 (r = 0.92) respectively. The male crabs showed positive allometric growth, whereas females had negative allometric growth. Analysis of covariance confirmed remarkable difference between males and females in the growth pattern. The mean relative condition factor (Kn values) of both males and females and of the pooled genders ranged from 0.680 (April) to 1.029 (November). A gradual raise in Kn values was observed from small-to big-sized crabs in both genders. Peak values were observed in 12.0-13.9 cm size group in November.

The food and feeding habits of the shrimp Solenocera melantho off Visakhapatnam coast were studied qualitatively and quantitatively. Feeding intensity differs in relation to gender, size, season and stage of maturity. Detritus was the major component of the food consumed, followed by crustaceans, molluscs, foraminiferans, fish remains, eggs; sand was also found as one of the gut contents. Diet preference in males and females was similar, but varied with size and season. The index of preponderance of detritus was 50.88% in males and 47.16% in females. Variation in feeding intensity was noticed in relation to size, months and season. The overall feeding intensity in males and females was categorized as actively fed (21.52% and 40.78% respectively), moderately fed (22.07%, 19.72%) and poorly fed (14.07%, 27.03%) respectively. S. melantho may designate as an omnivorous detritivore with scavenging activity.