| Impact ID | 5761 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Only third and fourth stage larvae of Anguillicola crassus were found in the swim bladders of fish. These late stage larvae were previously thought to only infect eels. |
| Reference | 40940 |
| Cost | |
| Location | Lake IJssel, Netherlands |