Identification of Marine Introduced Species
in New England

Marine Introduced Species Monitoring Resource Center

Salem Sound Coastwatch has developed resources to help you identify 13 common marine invaders that are currently in New England. The following links describe the species physical characteristics, habitat preference, current distribution, ecological concerns, and similar species. These species have been selected because they can be identified by volunteer monitors who have been trained. If you are interested in having these 13 introduced species plus the 7 potential invaders as laminated ID Cards, go to Salem Sound Coastwatch's Coastal Habitat Invasives Monitoring Program webpage.

Monitors can help document the presence/absence, abundance, and distribution of introduced species. With this information, a rapid expansion of a biological invader may be detected. Once volunteers have been trained in identification, regional organizations, such as Salem Sound Coastwatch, will help volunteers determine where to focus their energies in useful monitoring efforts.

Links to MIS Identification Cards

Styela clava PDF=106KB
club tunicate

Photo - Andrew Martinez

Botryllus schlosseri
star tunicate

Photo - Andrew Martinez

Botrylloides violaceus PDF=99KB
orange or red sheath tunicate

Photo - Andrew Martinez

Didemnum vexillumPDF=113KB
colonial tunicate

Photo - Dann Blackwell USGS

Ascidiella aspersa PDF=1MB
European sea squirt

Photo -Robert Buchsbaum

Diplosoma listerianum
diplosoma tunicate PDF=1.8MB

Photo - Picton..E. & Morrow, C.C.

Membranipora membranacea
lacy crust bryozoan PDF=1.8MB

Closeup Photo - Rob Gough

Diadumene lineata PDF=1.5MB
orange-striped anemone

Photo - Robert Buchsbaum

Ostrea edulis PDF=105KB
European flat oyster

Drawing - Rob Gough

Codium fragile spp. tomentosoides
green fleece

Drawing - Rob Gough

Hemigrapsus sanguineus
Asian shore crab PDF=984KB

Drawing - Rob Gough

Carcinus maenas PDF=119KB
European green crab

Drawing - Rob Gough

Grateloupia turuturu
red algae

Photo - Emily Jones


Scientific Books and Papers

Additional Web Site Links

Species Identification Resources


MIS Resource Center Home

Since 1991


Salem Sound

201 Washington Street
Suite 9
Salem, MA 01970

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