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
Mnemiopsis leidyi29
Codium fragile subsp. fragile29
Teredo navalis28
Cordylophora caspia28
Callinectes sapidus28
Potamopyrgus antipodarum28
Prorocentrum cordatum27
Rhithropanopeus harrisii27
Colpomenia peregrina26
Magallana gigas26
Oncorhynchus mykiss26
Styela clava25
Melanothamnus harveyi25
Bonnemaisonia hamifera25
Anguillicoloides crassus24
Crepidula fornicata23
Gracilaria vermiculophylla23
Caprella mutica22
Karenia mikimotoi21
Diadumene lineata21
Asparagopsis armata21
Sargassum muticum21
Botrylloides violaceus21
Ruditapes philippinarum21
Gonionemus vertens20
Dasysiphonia japonica20
Undaria pinnatifida19
Botryllus schlosseri19
Tricellaria inopinata18
Molgula manhattensis18
Antithamnionella ternifolia18
Gammarus tigrinus18
Amphibalanus eburneus17
Grateloupia turuturu17
Austrominius modestus17
Bugula neritina17
Rapana venosa17
Antithamnionella spirographidis16
Ensis leei16
Hemimysis anomala15
Pseudodiaptomus marinus15
Palaemon macrodactylus15
Dreissena polymorpha15
Bugulina stolonifera15
Mytilopsis leucophaeata15
Marenzelleria neglecta15
Odontella sinensis15
Neogobius melanostomus15
Oncorhynchus gorbuscha15
Mercenaria mercenaria14
Coscinodiscus wailesii14
Alexandrium minutum14
Marenzelleria viridis14
Petricolaria pholadiformis14
Monocorophium sextonae14
Alexandrium tamarense14
Hemigrapsus takanoi14
Psiloteredo megotara14
Ethmodiscus punctiger14
Jassa marmorata13
Amphibalanus amphitrite13
Corella eumyota13
Bonamia ostreae13
Chelicorophium curvispinum13
Homarus americanus13
Caprella scaura13
Didemnum vexillum13
Balanus trigonus13
Spartina townsendii var. anglica13
Beroe ovata13
Acipenser baerii13
Grandidierella japonica12
Mytilicola intestinalis12
Amathia verticillata12
Heterosigma akashiwo12
Palaemon elegans12
Blackfordia virginica12
Penaeus japonicus12
Balanus amphitrite12
Rangia cuneata12
Telmatogeton japonicus12
Pseudodactylogyrus anguillae12
Oithona davisae12
Pacifastacus leniusculus11
Crassostrea virginica11
Procambarus clarkii11
Garveia franciscana11
Styela plicata11
Faxonius limosus11
Pseudosolenia calcar-avis11
Platorchestia platensis11
Diplosoma listerianum11
Arcuatula senhousia11
Mytilus galloprovincialis11
Pileolaria berkeleyana11
Bugulina simplex11
Watersipora subtorquata10
Hemigrapsus sanguineus10
Anotrichium furcellatum10
Hydroides elegans10
Elodea canadensis10
Pseudopolydora paucibranchiata10
Cyprinus carpio10
Boccardiella ligerica10
Acipenser gueldenstaedtii10