| Country | Locality | Introduced | Year | Qualitative Value | Ref. |
|---|---|---|---|---|---|
| Greece | Northern Aegean Sea | 1995 - 1995 | very common | 58367 | |
| Greece | Northern Aegean Sea | 1996 - 1996 | abundant | 58367 | |
| Greece | Strymonikos and Ierissos Gulfs (Aegean Sea) | 1997 - 1997 | very common | 58475 | |
| Greece | Strymonikos and Ierissos Gulfs (Aegean Sea) | 1997 - 1997 | very common | 58475 | |
| Greece | Strymonikos and Ierissos Gulfs (Aegean Sea) | 1997 - 1997 | extremely abundant | 58475 | |
| Greece | Strymonikos and Ierissos Gulfs (Aegean Sea) | 1997 - 1997 | rare | 58475 | |
| Greece | Strymonikos and Ierissos Gulfs (Aegean Sea) | 1998 - 1998 | absent | 58475 | |
| Greece | Strymonikos and Ierissos Gulfs (Aegean Sea) | 1998 - 1998 | extremely abundant | 58475 | |
| Portugal | Alcochete, Tagus Estuary | 1995 - 1996 | common | 74754 | |
| Portugal | Óbidos Lagoon | 1993 - 1994 | very common | 74793 | |
| Portugal | Vila Franca de Xira, Tagus Estuary | 1995 - 1996 | very common | 74754 |