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Phylum Echinodermata
Class Echinoidea: Sea Urchins and Sand Dollars
Class Asteroidea: Sea Stars
Forbes' Sea Star
Asterias forbesi
Differentiated from the common sea star (Asterias rubens) by the orange dot near the center. Common sea stars, by contrast, have a white dot.
Phylum Cnidaria
Class Anthozoa: Corals and Sea Anemones
Northern Star Coral
Astrangia poculata
Class Scyphozoa: True Jellies
Atlantic Lion's Mane Jellyfish
Cyanea fulva
Phylum Arthropoda
Class Malacostraca: Crabs, Lobsters, Amphipods
Atlantic Rock Crab
Cancer irroratus
Color varies from brown to red to orange. Distinguished from the Jonah crab (Cancer borealis) by its relatively smaller claws. [pictured: exoskeleton]
Atlantic Mole Crab
Emerita talpoida
Asian Shore Crab
Hemigrapsus sanguineus
[NON-NATIVE]
Atlantic Mud Crab
Panopeus herbstii
Tidepool Scud
Gammarus oceanicus
Rockpool Shrimp
Palaemon elegans
Class Thecostraca: Barnacles
Northern Acorn Barnacle
Semibalanus balanoides
Phylum Mollusca
Class Bivalvia: Clams, Oysters, Mussels
Blue Mussel
Mytilus edulis
Class Gastropoda: Snails and Slugs
Common Atlantic Slipper Snail
Crepidula fornicata
Common Periwinkle
Littorina littorea
Distinguished from other periwinkles (Littorina spp.) by their larger size and light to dark brown shells.
[NON-NATIVE]
Rough Periwinkle
Littorina saxatilis
Distinguished from common periwinkles (Littorina littorea) by their smaller size and the pale yellow coloration of their shells. Distinguished from smooth periwinkles (Littorina obtusata) by the visible ridges on their shells.
Eastern Oyster Drill
Urosalpinx cinerea
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