# | Species | Year | Period | From - To | Reason | Established in the wild | Ref. no. |
1 | Bugula neritina | 1921 | 1900-1924 | Possibly Mediterranean - Pearl Harbor | accidental with ships | yes | 003356 |
2 | Ophryotrocha labronica | 1950-1974 | Mediterranean - Los Angeles Harbor, California | ballast water | Unknown | 003224 | |
3 | Schizoporella errata | 1925-1949 | Mediterranean - Pearl Harbor | accidental with ships | Unknown | 003356 |