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CISAC has compiled the list below of over 1,700 species known to be invasive in California or a potential threat for introduction to the state. Please use the comment form below to let us know about: taxa that should be added or removed; species information that you would change; and species that you think should be a high priority for having a scorecard completed (choose Review Scorecards to see the list of scorecards already drafted). Make sure to click Save. Previous comments are displayed at the bottom of the page.

Download Species List (.csv) (to open in a Spreadsheet program)
This data download is provided to aid in the review of the draft invasive species list. We discourage other use of this data until it has been revised and finalized.

Scientific Name Common Name Typesort icon Subtype Extent Risk of Introduction First Source
Corbicula fluminea Asian clam invertebrate aquatic mollusk, freshwater widespread n/a (already in CA) ANSTF
Potamopyrgus antipodarum New Zealand mudsnail invertebrate aquatic mollusk, freshwater limited n/a (already in CA) CAISMP
Busycotypus canaliculatus Channeled whelk invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Ilynassa obsoleta Eastern mudsnail invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Littorina saxatilis Rough periwinkle invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Myosotella myosotis Mouse-ear marshsnail invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Urosalpinx cinerea Atlantic oyster drill invertebrate aquatic mollusk, marine widespread n/a (already in CA) Exoticsguide
Geukensia demissa Ribbed horsemussel invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Musculista senhousia Green bagmussel invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Mya arenaria Soft-shell clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Corbula amurensis Overbite clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Venerupsis phillipinarus Japanese littleneck clam invertebrate aquatic mollusk, marine limited n/a (already in CA) Exoticsguide
Orconectes rusticus Rusty crayfish invertebrate crustaceans and tunicates not present high NISIC
Carcinus maenas Green crab invertebrate crustaceans and tunicates limited n/a (already in CA) NISIC
Eriocher sinensis Chinese mitten crab invertebrate crustaceans and tunicates limited n/a (already in CA) CAISMP
Botrylloides violaceus Chain sea squirt invertebrate crustaceans and tunicates limited n/a (already in CA) Exoticsguide
Didemnum vexillum Sea squirt invertebrate crustaceans and tunicates limited n/a (already in CA) Exoticsguide
Styela clava Club sea squirt invertebrate crustaceans and tunicates widespread n/a (already in CA) Exoticsguide
Botryllus schlosseri Star sea squirt invertebrate crustaceans and tunicates limited n/a (already in CA) Exoticsguide
Balanus amphitrite Striped barnacle invertebrate crustaceans and tunicates limited n/a (already in CA) Exoticsguide
Bugula neritina Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Cryptosula pallasiana Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Watersipora subtorquata Moss animal invertebrate other limited n/a (already in CA) Exoticsguide
Clathria polifera Red beard sponge invertebrate other limited n/a (already in CA) Exoticsguide
Diadumene lineata Orange-stripped anemone invertebrate other limited n/a (already in CA) Exoticsguide
Ficopomatus enigmaticus Sea worms invertebrate other limited n/a (already in CA) Exoticsguide
Cryptocotyle lingua Black Spot parasite of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Gyrodactylus elegans Parasitic flatworm of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Ichthyophithirius multifilis Parsitic protozoan of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Mitraspora cyprini Fujita Parasitic protozoan of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Oodinium pilularis Velvet disease invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Pleistophora hyphessobryconis Neon-tetra disease of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Protopalina symphysodonis Protopalina symphysodonis infection of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Trichodinella epizootica Protozoic parasite of fish invertebrate nematode VALUE REQUIRED VALUE REQUIRED No list
Corbicula fluminalis Corbicula fluminalis invertebrate aquatic mollusk, freshwater limited n/a (already in CA) ANSTF
Potamocorbula amurensis Amur River Corbula Clam invertebrate aquatic mollusk, marine VALUE REQUIRED VALUE REQUIRED NISIC
Sphaeroma quoyanum Isopod invertebrate crustaceans and tunicates VALUE REQUIRED VALUE REQUIRED NISIC
Lydorus pedicellatus Blacktip shipworm invertebrate aquatic mollusk, marine VALUE REQUIRED VALUE REQUIRED IMEAC
Teredo barstschi Shipworm invertebrate aquatic mollusk, marine VALUE REQUIRED VALUE REQUIRED IMEAC
Limnoria tripunctata Mediterranean gribble invertebrate crustaceans and tunicates limited n/a (already in CA) IMEAC
Limnoria quadripuncatata Mediterranean gribble invertebrate crustaceans and tunicates limited n/a (already in CA) IMEAC
mytilus galloprovincialis Mediterranean blue mussel invertebrate aquatic mollusk, marine widespread n/a (already in CA) IMEAC
Schizoporella unicornis Single horn bryozoan invertebrate other limited n/a (already in CA) IMEAC
Xanthomonas anoxopodis pv. citri Citrus Canker disease bacterium not present high USDA Plant/Pest
Aphtae epizooticae Hoof and mouth disease disease virus not present moderate CDFA AHFSS
Avian Influenza A (H5N1) Avian influenza disease virus not present moderate CDFA report
Xylella fastidiosa Pierce's Disease/grapevine disease bacterium limited moderate CDFA PD/GWSS
Raffaelea lauricola Laurel Wilt Disease disease fungus not present moderate National IS Info
Phytophthora ramorum Sudden oak death disease oomycete limited n/a (already in CA) APHIS OPIS
Yersinia pestis Bubonic Plague disease bacterium widespread n/a (already in CA) NIAID
Flavivirus 2 West Nile Virus disease virus widespread n/a (already in CA) Iowa State Univ
Candidatus Liberibacter africanus Huanglongbing disease of citrus-African strain disease bacterium not present low USDA Plant/Pest
Candidatus Liberibacter americanus Huanglongbing disease of Citrus-Americas Strain disease bacterium not present moderate USDA Plant/Pest
Candidatus Liberibacter asiaticus Huanglongbing disease of Citrus-Asian Strain disease bacterium not present high USDA Plant/Pest
Candidatus Liberibacter solanacearum potato zebra chip disease bacterium not present VALUE REQUIRED APHIS OPIS
Mycobacterium bovis Bovine tuberculosis disease bacterium limited n/a (already in CA) Iowa State Univ
Ralstonia solanacearum Bacterial wilt disease bacterium not present VALUE REQUIRED NAPPO
Ralstonia solanacearum race 3 biovar 2 Geranium Bacterial Wilt/Select Agent disease bacterium not present VALUE REQUIRED NAPPO
Ceratocystis fagacearum Oak wilt disease fungus not present moderate USDA Plant/Pest
Entyloma oryzae Leaf Smut of rice disease fungus not present low APHIS OPIS
Gymnosporangium asiaticum Rust: Pear and Juniper disease fungus not present VALUE REQUIRED APHIS OPIS
Phakopsora pachyrhizi Asian soybean Rust disease fungus not present low National IS Info
Puccinia graminis f. sp. tritici Wheat stem rust (Uganda 99 strain)/Black rust disease fungus not present moderate National IS Info
Synchytrium endobioticum Potato Wart/Select Agent disease fungus not present low EPPO
Tilletia (neovossia) indica Karnal bunt disease fungus limited n/a (already in CA) EPPO
Peronosclerospora philippinensis (aka, sacchari) Philippine Downy mildew of sorghum/Select Agent disease oomycete not present VALUE REQUIRED No list
Schlerophthora rayssiae var zeae Brown Stripe Downy mildew of corn/Select Agent disease oomycete not present VALUE REQUIRED No list
Candidatus phytoplasma Witches broom disease of lime disease phytoplasma not present VALUE REQUIRED APHIS OPIS
Unknown pathogenic phytoplasma 11 Texas phoenix palm phytoplasma disease phytoplasma not present VALUE REQUIRED No list
Unknown pathogenic virus or phytoplasma Australian citrus dieback n/a probably phytoplasma disease unknown not present VALUE REQUIRED No list
Unknown pathogenic virus or prion 1 Bovine spongiform encephalopathy (BSE) disease unknown not present low Iowa State Univ
Capillovirus of unknown genus Apple stem grooving virus disease virus not present VALUE REQUIRED No list
Morbillivirus RBOK Rinderpest virus disease virus not present VALUE REQUIRED Chavarria NRDC
Paramyxovirus-1 (PMV-1) Exotic newcastle disease (END) disease virus not present high National IS Info
Pestivirus CSFV strain Brescia Classical swine fever virus (strain Brescia) disease virus not present VALUE REQUIRED CDFA AHFSS
Porcine herpesvirus 1 Swine pseudorabies disease virus not present VALUE REQUIRED Chavarria NRDC
Potyviruses: Potyviridae Plum pox disease virus not present moderate APHIS OPIS
Tospovirus cacv Capsicum chlorosis virus disease virus not present VALUE REQUIRED No list
Tymovirus (?) Citrus sudden death n/a probably Tymovirus disease virus not present VALUE REQUIRED No list
Mandarivirus icrsv Indian citrus ringspot virus disease virus not present low NAPPO
n/a Citrus chlorotic dwarf n/a Citrus chlorotic dwarf disease virus not present VALUE REQUIRED APHIS OPIS
n/a Citrus leaf blotch virus n/a Citrus leaf blotch virus disease virus not present VALUE REQUIRED No list
Cilivirus cilv-c Citrus leprosis virus C disease virus not present high Acarology Journa
n/a Citrus vein-enation virus probably Luteovirus n/a Citrus vein-enation virus probably Luteovirus disease virus not present VALUE REQUIRED No list
n/a Citrus viroids n/a Citrus viroids disease virus not present VALUE REQUIRED No list
n/a Indian citrus ringspot virus n/a Indian citrus ringspot virus disease virus not present VALUE REQUIRED CACASA
Satsuma dwarf virus, Sadwa virus SDV Satsuma dwarf virus disease virus not present VALUE REQUIRED No list
Tomato Yellow Leaf Curl Sardinia Virus, TYLCSV Tomato Yellow Leaf Curl Sardinia Virus disease virus not present VALUE REQUIRED No list
Vibrio cholerae Cholera disease bacterium limited n/a (already in CA) CIDRAP
Claviceps spp. Sorghum Ergot disease fungus limited VALUE REQUIRED APHIS OPIS
Fusarium graminearium Fusarium Head Blight disease fungus limited VALUE REQUIRED APHIS OPIS
Puccinia horiana Chrysanthemum White Rust disease fungus limited n/a (already in CA) CACASA
Uromyces transversalis Gladiolus Rust disease fungus limited n/a (already in CA) USDA pest
Spiroplasma citri Citrus stubborn disease disease spiroplasma limited VALUE REQUIRED CACASA
Luteovirus n/a Citrus vein-enation virus probably Luteovirus disease virus limited VALUE REQUIRED No list
Tospoviruses Tomato spot wilt virus disease virus limited VALUE REQUIRED APHIS OPIS
Closterovirus CTV Citrus tisteza virus disease virus limited moderate APHIS OPIS
Crinivirus CYSDV Cucurbit Yellow Stunting Disorder Virus disease virus limited moderate EPPO
Curtovirus CTVCP Curly top virus disease virus widespread n/a (already in CA) CDFA (reg. A)
n/a Citrus psorosis virus n/a Citrus psorosis virus disease virus limited VALUE REQUIRED No list