| Impact ID | 6114 |
| Impact Type | Disease/Parasite/Toxicity |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Wild European eels with Anguillicola crassus infections had thickened swim bladder walls and almost no gas. Many of the swim bladders had collapsed. |
| Reference | 40165 |
| Cost | |
| Location | Netherlands |