Table 2. Comparison of tetrodotoxin (TTX) concentrations (μg/g) in muscle, intestine and liver of Takifugu pardalis and Takifugu niphobles by LC-MS/MS
| Puffer fish | Sampling date | Toxicity (μg/g) |
| Muscle (Mean ± SD) | Intestine (Mean ± SD) | Liver (Mean ± SD) |
| Takifugu pardalis | Jan. 2014 (n = 7) | 1.3 ± 2.8 | 18.8 ± 16.5 | 23.3 ± 24.7 |
| Feb. 2014 (n = 7) | 1.6 ± 1.9 | 31.4 ± 24.7 | 82.0 ± 54.2 |
| Mar. 2014 (n = 7) | 1.4 ± 2.2 | 49.8 ± 38.6 | 96.8 ± 42.0 |
| Takifugu niphobles | Jan. 2014 (n = 7) | 2.0 ± 3.2 | 23.9 ± 25.0 | 28.1 ± 15.8 |
| Feb. 2014 (n = 7) | 4.5 ± 2.7 | 71.5 ± 22.8 | 114.8 ± 87.3 |
| Mar. 2014 (n = 7) | 1.6 ± 1.4 | 25.9 ± 14.4 | 39.9 ± 32.5 |
LC-MS/MS, liquid chromatograph-tandem mass spectrometry.