| Impact ID | 2333 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Mottle sculpin (Cottus bairdii) and Johnny darter (Etheostoma nigrum) have been regionally extirpated since the introduction of Neogobius melanostomus. |
| Reference | 22628 |
| Great Lakes Region | Yes |
| Cost | |
| Location | |
