| Name of the bazar | Name of the fish | Source | No. of fish | Formalin presence | Percentage (%) |
| 1) Tangail Park Bazaar
2) Charabari Bazaar, Tangail
3) Modhupur Bazaar, Tangail | Mrigal | Bil | 09 | Yes (06) |
14.66% |
| Karfu | Pond | 09 | No | ||
| Rui | River | 09 | Yes (04) | ||
| Brigad | Pond | 09 | No | ||
| Kalbaoush | Bil | 09 | No | ||
| Katol | Pond | 09 | Yes (07) | ||
| Silver karp | Pond | 09 | No | ||
| Columbo | River | 09 | No | ||
| Boal | Bil | 09 | No | ||
| Sorputi | Pond | 09 | No | ||
| Baen | River | 09 | No | ||
| Chitol | River | 09 | No | ||
| Elish | Sea | 09 | No | ||
| Telapia | Pond | 09 | No | ||
| Boal | Bil | 09 | No | ||
| Aaeer | Imported | 03 | Yes (03) | ||
| Katol | Imported | 03 | Yes (03) | ||
| Pabda | Imported | 03 | Yes (03) | ||
| Rui | Imported | 03 | Yes (03) | ||
| Gulsha | Imported | 03 | Yes (03) |