The muscle and testis, however, are nontoxic or weakly toxic and their consumption is thus permitted in Japan. The liver and ovary, and, in some species, the skin, are strongly toxic and the ingestion of these tissues often causes food poisoning. Marine pufferfish of the genus Takifugu inhabiting the coastal waters of Japan possess the potent neurotoxin tetrodotoxin (TTX) as the major toxic component. Pufferfish of the family Tetraodontidae are generally toxic, but the toxin profile differs, depending on the genus or species. valentini should be considered a pufferfish with considerable amounts of both TTX and STXs present simultaneously. Like the marine pufferfish of the genus Arothron, C. The TTX/STX ratio varied greatly, depending on the tissue, but TTX was the major toxin component in the whole body, and STXs accounted for 25% and 13% of the total toxin amount in males and females, respectively. The toxins were also detected in the other tissues, but in much lower amounts than in the skin and ovary. Analysis of the extracts for TTX by liquid chromatography tandem mass spectrometry and of STXs by high-performance liquid chromatography with post-column fluorescence derivatization revealed TTX, as well as a large amount of STXs, with neoSTX as the main component and dicarbamoylSTX and STX itself as minor components, in the skin and ovary. valentini specimens (four male and six female) were collected from Amami-Oshima Island, Kagoshima Prefecture, Japan, and the toxins were extracted from the muscle, liver, intestine, gallbladder, gonads, and skin. In the present study, to clarify the distribution profile of TTX and STXs in Tetraodontidae, we investigated the composition and intra-body distribution of the toxins in Canthigaster valentini. Pufferfish of the family Tetraodontidae possess tetrodotoxin (TTX) and/or saxitoxins (STXs), but the toxin ratio differs, depending on the genus or species.
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