Marine Aliens II project

Controlling marine invasive species by targetting vectors of dispersal

The 'most wanted' invasive non-native species


The Marine Aliens 2 project has published a new identification guide for 22 selected marine non-native species, aimed at the recreational boat owning community and those who have an interest in maintaining healthy and productive inshore waters. The following species are in the guide:


Wireweed Sargassum muticum

Wakame Undaria pinnatifida

Harpoon weed Asparagopsis armata

Devilís tongue weed Grateloupia turuturu

Orange striped anemone Haliplanella lineata

Darwinís barnacle Elminius modestus

Striped Barnacle Balanus amphitrite

Japanese skeleton shrimp Caprella mutica

Chinese mitten crab Eriocheir sinensis

Trumpet tube worm Ficopomatus enigmaticus

Ruby bryozoan Bugula neritina

A bryozoan Watersipora subtorquata

Pacific oyster Crassostrea gigas

Slipper limpet Crepidula fornicata

Veined rapa whelk Rapana venosa

American oyster drill Urosalpinx cinerea

Orange-tipped sea squirt Corella eumyota

Leathery sea squirt Styela clava

The colonial sea squirts Botrylloides violaceus and B. diegense

Carpet sea squirt Didemnum vexillum

A colonial sea squirt Perophora japonica


Front cover of new alien species identification guide


The guide is on sale for £3.50 a copy.

Please make cheques payable to: The Marine Biological Association, and send a stamped (51p per guide UK excluding Channel Islands), addressed envelope to:

The Marine Biological Association
Citadel Hill


For further information, please contact Guy Baker email:
Tel: 01752 633244


Or download the guide

This is a PDF file. Please check you have Adobe Acrobat Reader installed. [View Identification Guide 28 Mb].


Please send us your sightings of these species. Find out more about marine life recording.

Partners NHM QUB Univeristy of Plymouth MBA SAMS