Distribution of guanidino-compounds in various tissues of aquatic animals were studied. The results obtained were as follows. No more than creatine, creatinine and arginine were de-tested in various tissues of fishes analysed.
In fishes, creatine contents were high in white muscle followed by dark muscle, brain, stomach, pyloric caecum and heart. Creatinine and arginine contents in fishes, were very little.
In prawn and swimming crab, arginine alone was detected and its content was very high in muscle followed by brain, stomach, intestine, heart and liver.
In cattle fish and pacific octopus, arginine content was high in mantle followed by heart, arm, brain, stomach, intestinal caecum, intestine, liver, pancreas, ovary and testis. And octopine was detected in its mantle and arm.