Invasive Species Northern Ireland

Carpet sea squirt

Didemnum vexillum

Status:

Established

Habitat:

Marine

Threats:

Alter marine habitats.

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Devil’s tongue weed

Grateloupia turuturu

Status:

Established

Habitat:

Marine

Threats:

Outcompetes native species. Can survive in a wide range of habitats.

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Japanese skeleton shrimp

Caprella mutica

Status:

Established

Habitat:

Marine

Threats:

Reproduces quickly. Outcompetes native species.

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Leathery sea squirt

Styela clava

Status:

Established

Habitat:

Marine

Threats:

Competes against native species for food and space. Fouls boats, oyster beds and moorings

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Pacific oyster

Magallana gigas

Status:

Established

Habitat:

Marine

Threats:

Encrusts hard surfaces

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Slipper limpet

Crepidula fornicata

Status:

Established

Habitat:

Marine

Threats:

Habitat Alteration.

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Smooth cordgrass

Spartina anglica

Status:

Established

Habitat:

Marine

Threats:

Negative impacts on native intertidal communities.

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Wakame

Undaria pinnatifida

Status:

Established

Habitat:

Marine

Threats:

Habitat alteration. Loss of native biodiversity.

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Wire weed

Sargassum muticum

Status:

Established

Habitat:

Marine

Threats:

Competition with native species.

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