Invasive Species

Country/Area Introduced

Scientific Name

Common Name

From

To

Amaurochiton glaucus

chiton

New Zealand

Australia

Ammothea hilgendorfi

sea spider

Japan

United Kingdom

Antithamnionella spirographidis

none (marine plant)

Mediterranean, originating in the North Pacific

United Kingdom

Antithamnionella ternifolia

none (marine plant)

Southern hemisphere

United Kingdom

Asterias amurensis

Japanese seastar

China, Japan, Korea, Russia

Southeastern Australian and Tasmanian waters

Balanus amphitrite

barnacle

Southwestern Pacific and Indian oceans

North Pacific and Atlantic oceans

Balanus improvisus

barnacle

North America and Europe

Australia and Japan (historic: 1890-1930's)

Boccardia proboscidea

polychaete

Pacific coast North America (California, US and British Columbia, Canada) and Japan

Australia

Carcinus maenas

European shore crab (green crab)

European Atlantic waters

Australia, US, Brazil, Panama, Hawaii, Ceylon, South Africa

Ciona intestinalis

ascidian

North Atlantic

Australia, Pacific North America, Hong Kong, and China Sea

Clavopsella navis

hydrozoan

unknown

United Kingdom

Codium fragile

green sea-fingers (alga)

Japan, Northwest Pacific

Australia, New Zealand, Europe, Mediterranean, and North America

Crepidula fornicata

slipper limpet

North America

United Kingdom

Elminius modestus

barnacle

Australia or New Zealand, originates from Australasia

United Kingdom

Ensis americanus

American jack knife clam

Atlantic coast of North America

United Kingdom

Ensis directus

North American razor clam

North America

Europe and is spreading to Denmark, Belgium, Netherlands and France

Eriocheir sinensis

Chinese mitten crab

China, Korean Peninsula.

United Kingdom

Godiva quadricolor

nudibranch

Southern Africa

Australia

Goniadella gracilis

polychaete

East coast of the US

North America and South Africa

Gymnodinium catenatum

green-brown flagellete

Gulf coast of California, and Pacific coast of Mexico

Australia

Haliplanella luciae

orange-striped anemone

Western Pacific or North America

Germany

Hydroides dianthus

polychaete tubeworm

East coast of North America or Mediterranean

United Kingdom

Hydroides ezoensis

polychaete tubeworm

Japan

United Kingdom

Janua brasiliensis

polychaete tubeworm

Brazil

United Kingdom

Lateolabrax japonicus

Japanese sea bass

Japan, Koren, Taiwan, and China

Australia

Marenzelleria viridis

polychaete

East Coast of North America

Firth of Forth, Firth of Tay, and the Ems Estuary of the European mainland coast

Megabalanus rosa

acorn barnacle

Japan, China, Taiwan

Australia (historic 1981)

Megabalanus tintinnabulm

barnacle

unknown

Australia, Thailand, Japan, New Zealand

Mnemiopsis leidyi

American Atlantic coast comb jelly

North American Atlantic coast

Black and Azov seas

Mytilopsis sallei

bivalve

Central America

Visakhapatnam Harbour, India

Odontella sinensis

centric diatom

China Sea, Red Sea, or Indian Ocean

Europe

Paracereis sculpta

isopod

Pacific coast North America

Australia

Paradella dianae

isopod

Pacific coast North America

Australia

Pileolaria berkeleyana

polychaete tubeworm

Japan

United Kingdom

Pleurosigma simonsenii

pennate diatom

Indian Ocean

English Channel

Pyromaia tuberculata

spider crab

Pacific coast North America

Australia, New Zealand

Rhithropanopeus harrisii

Zuiderzee crab, dwarf crab

East Coast of the American continent from New Brunswick to northeast Brazil.

United Kingdom

Sabella (= Spirographis) spallanzanii

Sabellid fan worm

Mediterranean

Australia

Sargassum muticum

wire weed, or strangle weed

France, originates in Japanese and Chinese waters

United Kingdom

Schizoporella unicornis

bryozoan

Japan

Australia, North America, Europe

Solieria chordalis

none (marine plant)

France

United Kingdom

Spartina anglica

common cord-grass or Townsend's grass or ricegrass

East coast of North America

United Kingdom

Sphaeroma walkeri

isopod

Northern Indian Ocean

Australia, Mediterranean, South Africa, Brazil, Florida-Caribbean, Egypt, India, Hawaii, and California

Styela clava

leathery sea squirt

Japan, Korea, and Siberia coasts

Australia, United Kingdom, Atlantic and Pacific North America

Styela plicata

sea squirt

Philippines

Australia

Synidotea laevidorsalis

Asian isopod

East Asia

Australia and Eastern Pacific

Thecacera pennigera

opisthobranch

Eastern coast South America

Australia

Undaria pinnatifida

Japanese kelp

Japan, Korea and China

Southeastern Australian and Tasmanian waters, New Zealand

Watersipora arcuata

lace coral

Mexico

Australia

Multiple species

Cholera (microscopic bacteria)

Latin America

Gulf Coast of the United States