Taxonomic Group	Name	Year	Invasion Status	Population Status	Vectors
Fishes	Alosa sapidissima	1942	Definite	Established	Natural Dispersal
Crustaceans-Barnacles	Amphibalanus improvisus	1955	Definite	Established	Ballast Water, Hull Fouling, Oyster Intentional
Crustaceans-Amphipods	Ampithoe valida	2000	Definite	Established	Ballast Water, Hull Fouling, Oyster Accidental
Platyhelminthes	Austrobilharzia variglandis*	2003	Definite	Established	Oyster Accidental
Mollusks-Gastropods	Batillaria attramentaria	2007	Definite	Established	Fisheries Accidental (not Oyster), Oyster Accidental
Tunicates	Botrylloides violaceus	1979	Definite	Established	Hull Fouling, Oyster Accidental
Tunicates	Botryllus schlosseri	2000	Definite	Established	Hull Fouling, Oyster Accidental
Algae	Campylaephora kondoi*	2007	Definite	Established	Oyster Accidental
Crustaceans-Amphipods	Caprella drepanochir	1996	Definite	Established	Ballast Water, Hull Fouling, Oyster Accidental
Crustaceans-Crabs	Carcinus maenas	1998	Definite	Established	Ballast Water, Discarded Bait, Hull Fouling, Natural Dispersal
Mollusks-Gastropods	Cecina manchurica	1963	Definite	Established	Oyster Accidental
Platyhelminthes	Cercaria batillariae*	2016	Definite	Established	Fisheries Accidental (not Oyster)
Sponges	Chalinula loosanoffi*	2000	Definite	Established	Hull Fouling, Oyster Accidental
Arthropoda-Insects	Chilacis typhae*	1998	Definite	Established	Aquatic Plant Shipments, Cargo, Dry Ballast
Sponges	Clathria prolifera*	1967	Definite	Established	Hull Fouling, Oyster Accidental
Cnidarians-Hydrozoans	Cordylophora caspia	2000	Definite	Established	Hull Fouling, Oyster Accidental
Mollusks-Gastropods	Crepidula fornicata	1937	Definite	Established	Oyster Accidental
Mollusks-Gastropods	Crepidula plana	1937	Definite	Established	Oyster Accidental
Cnidarians-Anthozoans	Diadumene lineata	1967	Definite	Established	Hull Fouling, Oyster Intentional
Crustaceans-Ostracods	Eusarsiella zostericola	2000	Definite	Established	Oyster Accidental
Algae	Gracilaria vermiculophylla	2017	Definite	Established	Oyster Accidental
Crustaceans-Amphipods	Grandidierella japonica	1985	Definite	Established	Hull Fouling, Oyster Accidental
Annelids-Polychaetes	Hediste diadroma	2009	Definite	Established	Ballast Water, Hull Fouling, Natural Dispersal
Platyhelminthes	Himasthla quissetensis*	2003	Definite	Established	Oyster Accidental
Annelids-Polychaetes	Hobsonia florida	2000	Definite	Established	Ballast Water, Hull Fouling, Oyster Accidental
Mollusks-Gastropods	Ilyanassa obsoleta	1945	Definite	Established	Oyster Accidental
Crustaceans-Amphipods	Jassa marmorata	2000	Definite	Established	Ballast Water, Hull Fouling, Oyster Accidental
Mollusks-Bivalves	Laternula gracilis	1998	Definite	Established	Oyster Accidental
Crustaceans-Isopods	Limnoria tripunctata	1964	Definite	Established	Hull Fouling, Oyster Accidental
Mollusks-Bivalves	Magallana gigas	1928	Definite	Established	Oyster Intentional
Crustaceans-Amphipods	Melita nitida	1994	Definite	Established	Hull Fouling, Oyster Accidental
Tunicates	Molgula manhattensis	2000	Definite	Established	Hull Fouling, Oyster Accidental
Crustaceans-Amphipods	Monocorophium acherusicum	1968	Definite	Established	Hull Fouling, Oyster Intentional
Crustaceans-Amphipods	Monocorophium insidiosum	2000	Definite	Established	Ballast Water, Hull Fouling, Oyster Accidental
Mollusks-Bivalves	Mya arenaria	1876	Definite	Established	Fisheries Intentional
Mollusks-Gastropods	Myosotella myosotis	1963	Definite	Established	Cargo, Dry Ballast, Oyster Accidental
Crustaceans-Copepods	Mytilicola orientalis	1938	Definite	Established	Hull Fouling, Oyster Accidental
Cnidarians-Anthozoans	Nematostella vectensis	2009	Definite	Established	Hull Fouling, Oyster Accidental
Mollusks-Bivalves	Neotrapezium liratum	1947	Definite	Established	Oyster Accidental
Crustaceans-Cumaceans	Nippoleucon hinumensis	2001	Definite	Established	Ballast Water, Oyster Accidental
Mollusks-Bivalves	Nuttallia obscurata	2002	Definite	Established	Ballast Water, Fisheries Accidental (not Oyster), Natural Dispersal
Mollusks-Gastropods	Ocinebrellus inornatus	1939	Definite	Established	Oyster Accidental
Crustaceans-Isopods	Orthione griffenis	1988	Definite	Established	Discarded Bait, Natural Dispersal
Crustaceans-Amphipods	Paracorophium sp.	2022	Definite	Established	Hull Fouling, Oyster Accidental
Mollusks-Bivalves	Petricolaria pholadiformis	1943	Definite	Established	Oyster Accidental
Annelids-Polychaetes	Polydora cornuta	2000	Definite	Established	Ballast Water, Hull Fouling, Oyster Accidental
Mollusks-Gastropods	Potamopyrgus antipodarum	2002	Definite	Established	Fisheries Accidental (not Oyster), Hull Fouling, Natural Dispersal
Arthropoda-Insects	Prokelisia marginata*	2000	Definite	Established	Biocontrol
Crustaceans-Copepods	Pseudodiaptomus inopinus	1991	Definite	Established	Ballast Water, Natural Dispersal
Annelids-Polychaetes	Pseudopolydora cf. kempi	2000	Definite	Established	Oyster Accidental
Annelids-Polychaetes	Pseudopolydora paucibranchiata	1996	Definite	Established	Oyster Accidental
Mollusks-Bivalves	Ruditapes philippinarum	1946	Definite	Established	Oyster Accidental
Algae	Sargassum muticum	1953	Definite	Established	Oyster Accidental
Bryozoans	Schizoporella japonica	1970	Definite	Established	Hull Fouling, Oyster Accidental
Crustaceans-Tanaids	Sinelobus cf. stanfordi	1996	Definite	Established	Hull Fouling, Oyster Accidental
Annelids-Polychaetes	Streblospio benedicti	2000	Definite	Established	Ballast Water, Hull Fouling, Oyster Accidental
Crustaceans-Isopods	Synidotea laticauda	1987	Definite	Established	Ballast Water, Hull Fouling, Oyster Accidental
Mollusks-Bivalves	Teredo navalis	1957	Definite	Established	Hull Fouling
Protozoans	Trochammina hadai*	1998	Definite	Established	Ballast Water, Oyster Accidental, Unknown Vector
Mollusks-Gastropods	Urosalpinx cinerea	1948	Definite	Established	Oyster Accidental

* = Species summary still under review.

p270 (Willapa Bay) Summary