| Impact ID | 6439 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | In some cases, Atherina boyeri dominates the fish community where introduced. In the Mala Neretva estuary, A. boyeri reached high densities to the point where it made up 50% of the fish composition. |
| Reference | 35071 |
| Cost | |
| Location | Neretva River estuary, Croatia |