Most widespread species

This option provides the list of non-indigenous and cryptogenic species which were recorded in 10 or more recipient countries worldwide. This data is being retrieved from the records, which currently are in the AquaNIS public domain. Currently our listing is mostly for European regional seas, including also other marine regions, for which some data exist in AquaNIS (e.g. East Asia, New Zealand shelf, Canadian Arctic…).

Note: There is more information on species biology, introduction events, etc. which can be obtained using the AquaNIS "Advanced search" function.
SpeciesNumber of introduced countries
Mya arenaria36
Amphibalanus improvisus35
Ficopomatus enigmaticus33
Acartia (Acanthacartia) tonsa32
Eriocheir sinensis31
Codium fragile subsp. fragile29
Mnemiopsis leidyi29
Teredo navalis29
Potamopyrgus antipodarum28
Callinectes sapidus28
Cordylophora caspia28
Prorocentrum cordatum27
Rhithropanopeus harrisii27
Colpomenia peregrina26
Magallana gigas26
Oncorhynchus mykiss26
Styela clava25
Melanothamnus harveyi25
Bonnemaisonia hamifera25
Anguillicoloides crassus24
Crepidula fornicata23
Gracilaria vermiculophylla23
Caprella mutica22
Asparagopsis armata21
Sargassum muticum21
Diadumene lineata21
Ruditapes philippinarum21
Botrylloides violaceus21
Karenia mikimotoi21
Dasysiphonia japonica20
Gonionemus vertens20
Botryllus schlosseri19
Undaria pinnatifida19
Tricellaria inopinata18
Molgula manhattensis18
Gammarus tigrinus18
Antithamnionella ternifolia18
Bugula neritina17
Austrominius modestus17
Amphibalanus eburneus17
Grateloupia turuturu17
Rapana venosa17
Ensis leei16
Antithamnionella spirographidis16
Mytilopsis leucophaeata15
Oncorhynchus gorbuscha15
Palaemon macrodactylus15
Dreissena polymorpha15
Hemimysis anomala15
Odontella sinensis15
Bugulina stolonifera15
Neogobius melanostomus15
Marenzelleria neglecta15
Pseudodiaptomus marinus15
Ethmodiscus punctiger14
Alexandrium minutum14
Alexandrium tamarense14
Psiloteredo megotara14
Mercenaria mercenaria14
Marenzelleria viridis14
Monocorophium sextonae14
Hemigrapsus takanoi14
Petricolaria pholadiformis14
Coscinodiscus wailesii14
Amphibalanus amphitrite13
Bonamia ostreae13
Balanus trigonus13
Chelicorophium curvispinum13
Jassa marmorata13
Didemnum vexillum13
Caprella scaura13
Corella eumyota13
Beroe ovata13
Spartina townsendii var. anglica13
Acipenser baerii13
Homarus americanus13
Palaemon elegans12
Grandidierella japonica12
Penaeus japonicus12
Oithona davisae12
Pseudodactylogyrus anguillae12
Telmatogeton japonicus12
Amathia verticillata12
Balanus amphitrite12
Mytilicola intestinalis12
Heterosigma akashiwo12
Blackfordia virginica12
Rangia cuneata12
Diplosoma listerianum11
Arcuatula senhousia11
Pileolaria berkeleyana11
Pseudosolenia calcar-avis11
Bugulina simplex11
Styela plicata11
Garveia franciscana11
Faxonius limosus11
Pacifastacus leniusculus11
Procambarus clarkii11
Platorchestia platensis11
Crassostrea virginica11
Boccardiella ligerica10
Acipenser gueldenstaedtii10
Hemigrapsus sanguineus10
Anotrichium furcellatum10
Mytilus galloprovincialis10
Hydroides elegans10
Pseudopolydora paucibranchiata10
Cyprinus carpio10
Elodea canadensis10
Watersipora subtorquata10