| Scientific Name | Common Name | Notes |
| Class Malacostraca, Order Decapoda – Shrimps Krill Crayfish Lobster and Crabs | | |
| Family Penaeidae - Shrimp | | |
| Penaeus aztecus | Brown Shrimp | |
| Parapenaeus politus | Rose Shrimp | |
| Family Palaemonidae – Grass Shrimp | | |
| Palaemonetes intermedius | Brackish Grass Shrimp | |
| Palaemonetes pugio | Daggerblade Grass Shrimp | |
| Palaemonetes vulgaris | Marsh Grass Shrimp | |
| Leander tenuicornis | | on Sargassum weed in Menemsha Bight in 1906 – first New England record |
| Family Hippolytidae – Anemone Shrimp | | |
| Eualus pusiolus | | |
| Hippolyte zostericola | | Vineyard Sound is the type locality |
| Latreutes fucorum | | found on Sargassum weed in Vineyard sound 1875 1905 1906 |
| Lebbeus groenlandicus | | primarily a northern species |
| Lebbeus polaris | | primarily a northern species |
| Spirontocaris liljeborgii | | |
| Spirontocaris phippsii | | |
| Spriontocaris spinus | | at its southernmost known point here |
| Tozeuma carolinensis | | at its northernmost known point here |
| Tozeuma serratum | | at its northernmost known point here |
| Family Pandalidae - Shrimp | | |
| Dichelopandalus leptocerus | | in deeper water |
| Pandalus borealis | Northern Shrimp | at its southernmost known point here |
| Pandalus kessleri | Grass Shrimp | |
| Pandalus montagui | | |
| Family Crangonidae - Shrimp | | |
| Crangon septemspinosa | Seven-spine Bay Shrimp | common |
| Pontophilus brevirostris | | the type specimen is from Vineyard Sound |
| Pontophilus norvegicus | | |
| Family Nephropidae - American Lobster | | |
| Homarus americanus | | common |
| Family Scyllaridae – Spanish Lobster | | |
| Scyllarus depressus | | very rare; at its northernmost known point here |
| Family Callianassidae - Shrimp | | |
| Callianassa atlantica | | |
| Family Axiidae - Shrimp | | |
| Axius serratus | | |
| Calocaris templemani | | |
| Family Laomediidae – Mud Shrimp | | |
| Naushonia crangonoides | | at its northernmost known point here (cf. Naushon Island) |
| Upogebia affinis | | |
| Family Paguridae – Hermit Crabs | | |
| Pagurus acadianus | | |
| Pagurus annulipes | | common; very near its northernmost known point here |
| Pagurus arcuatus | | common |
| Pagurus politus | | |
| Pagurus pollicaris | | common |
| Pagurus pubescens | | found off Noman’s Land |
| Family Lithodidae – Spider Crab | | |
| Lithodes maja | | |
| Family Galatheidae - Crabs | | |
| Munida iris iris | | at its northernmost point here |
| Munida valida | | at its northernmost point here |
| Family Porcellanidae - Crabs | | |
| Polyonyx gibbesi | | Woods Hole is its northernmost known point |
| Porcellana sigsbeiana | | at its northernmost point here |
| Family Hippidae – Mole Crab | | |
| Emerita talpoida | Atlantic Mole Crab | Harwich is its northernmost known point |
| Family Homolidae - Crab | | |
| Homola barbata | | very near its northernmost known point here |
| Family Latreillidae - Crab | | |
| Latreillia manningi | | Nantucket Shoals is its northernmost known point |
| Family Dorippidae - Crab | | |
| Ethusa microphthalma | | at its northernmost known point here |
| Family Calappidae – Box Crabs | | |
| Acanthocarpus alexandri | | |
| Calappa flammea | Bashful Crab | Woods Hole is its northernmost known point |
| Family Majidae - Crabs | | |
| Collodes robustus | | near its northernmost known point here |
| Euprognatha rastellifwera | | |
| Hyas araneus | Toad Crab | Rhode Island is its southernmost known point |
| Hyas coarctatus | Toad Crab | |
| Libinia dubia | | Cape Cod is its northernmost known point |
| Libinia emarginata | Spider Crab | common |
| Pelia mutica | | common; near its northernmost point |
| Rochinia crassa | | Nantucket Shoals is its northernmost known point |
| Rochinia tanneri | | at its northernmost known point here |
| Family Parthenopidae - Crabs | | |
| Parthenope pourtalessi | | at its northernmost point here |
| Heterocrypta granulata | Smooth Elbow Crab | at its northernmost known point here |
| Family Cancridae – Crabs | | |
| Cancer borealis | Jonah Crab | common |
| Cancer irroratus | Rock Crab | common |
| Family Portunidae - Crabs | | |
| Carcinus maenas | Green Crab | invader from Europe; see Yamada (2001) |
| Ovalipes ocellatus | Lady Crab | common |
| Arenaeus cribrarius | | first New England records in 1905 and 1906; at its northernmost known locality here |
| Callinectes sapidus | Blue Crab | common |
| Portunus gibbesii | | very rare; found in 1905; at its northernmost known point here |
| Portunus sayi | | found occasionally on floating Sargassum weed |
| Family Xanthidae – Mud Crabs | | |
| Rhithropanopeus harrisii | | brackish water |
| Eurypanopeus depressus | Flat Mud Crab | uncommon |
| Neopanope sayi | | |
| Panopeus herbstii | Black-fingered Mud Crab | common |
| Hexapanopeus angustifrons | | uncommon; near its northernmost known point here |
| Family Pinnotheridae - Crabs | | |
| Pinnotheres maculatus | Mussel Crab | uncommon; at its northernmost point here |
| Pinnotheres ostreum | Oyster Crab | uncommon; Salem is its northernmost known point |
| Pinnixa chaetopterana | | uncommon; Wellfleet is its northernmost known point |
| Pinnixa cylindrica | | North Falmouth is its northernmost known point |
| Family Grapsidae - Crabs | | |
| Hemigrapsus sanguineus | Asian Shore Crab | invading species; uncommon but becoming more numerous and widespread; first found on Martha’s Vineyard in 1996 |
| Planes minutus | | found occasionally on floating Sargassum weed |
| Sesarma reticulatum | | Woods Hole is its northernmost known point |
| Family Ocypodidae – Fiddler Crabs | | |
| Ocypode quadrata | Atlantic Ghost Crab | |
| Uca minax | Red-jointed Fiddler Crab | |
| Uca pugilator | Sand Fiddler Crab | |
| Uca pugnax | Mud Fiddler Crab | common |
| Class Malacostraca, Order Euphausiacea | | |
| Family Euphausiidae | | |
| Thysanoessa inermis | | |
| Class Malacostraca, Order Amphipoda – Amphipods, Scuds, and Tube-builders | | |
| Family Caprellidae – Skeleton Shrimp | | |
| Aeginella longicornis | | common |
| Caprella geometrica | | common |
| Caprella linearis | | found on driftwood and Sargassum weed |
| Family Ampeliscidae | | |
| Ampelisca agassizi | | rare |
| Ampelisca macrocephala | | common |
| Ampelisca spinipes | | common |
| Byblis serrata | | |
| Family Aoridae | | |
| Microdeutopus [danmonensis?] | | |
| Microdeutopus gryllotalpa | | |
| Family Bateidae | | |
| [Batea secunda?] | | |
| Family Calliopidae | | |
| Apherusa [gracilis?] | | found off Gay Head |
| Calliopus laeviusculus | | |
| [Pontogenia inermis?] | | |
| Family Corophiidae | | |
| Cerapus tubularis | | |
| Corophium cylindricum | | common |
| Ericthonius [minax?] | | |
| Ericthonius rubricornis | | |
| Uniciola irrorate | | common |
| Family Gammarellidae | | |
| Gammarellus angulosus | | |
| Family Gammaridae | | |
| Elasmopus laevis | | |
| Gammarus annulatus | | |
| Gammarus locusta | | |
| Gammarus marinus | | |
| Gammarus mucronatus | Spine-backed Scud | |
| Gammarus palustris | Beach Flea | |
| Gammarus tigrinus | | common to abundant |
| Family Haustoriidae | | |
| Haustorius arenarius | | |
| Family Hyalellidae | | |
| Hyalella azteca | | |
| Family Isaeidae | | |
| Podoceropsis nitida | | |
| Family Ischyroceridae | | |
| Ischyrocerus anguipes | | |
| Jassa marmorata | | |
| Family Lafystiidae - Parasitic | | |
| Lafystius [sturonis?] | | |
| Family Lysianassidae | | |
| Anonyx nugax | | |
| [Haplonyx (= Tretonyx?) cicada?] | | |
| Lysianopsis alba | | |
| Leptocheirus pinguis | | |
| Family Photidae | | |
| Autonoe [smithi?] | | |
| [Ptilocheirus pinguis?] | | common |
| Family Phoxocephalidae | | |
| Eobrolgus spinosus | | |
| Phoxocephalus holbolli | | |
| Family Podoceridae | | |
| Amphithoe rubricata | | common |
| Amphithoe longimana | | |
| [Grubia compta?] | | |
| Sunamphithoe pelagica | | |
| Family Talitridae | | |
| Orchestia agilis | Beach Flea | common |
| Talorchestia longicornis | Sand Hopper | common |
| Talorchestia megalophthalma | Sand Hopper | common |
| Family Hyperiidae | | |
| Euthemisto bispinosa | | |
| Hyperia medusarum | | |
| Hyperia galba | | |
| Class Malacostrata, Order Cumacea | | |
| Family Diastylidae | | |
| Diastylis polita | | |
| Diastylis quadrispinosa | | |
| Diastylis sculpta | | |
| Family Leuconidae | | |
| Cyclaspis varianus | | |
| Eudorella truncatula | | found off Vineyard Sound Lightship |
| Eudorellopsis deformis | | found off Vineyard Sound Lightship |
| Class Malacostrata, Order Isopoda – Isopods, Sow Bugs, and Pill Bugs | | |
| Family Janiridae | | |
| Jaera marina | | |
| Family Anthuridae | | |
| Cyanthura carinata | | |
| [Calathura branchiata?] | | |
| Family Bopyridae | | |
| Stegophryxus hyptius | | |
| Family Cirolanidae | | |
| Cirolana concharum | | |
| Family Cymothoidae | | |
| Nerocila munda | | |
| Family Eurycopidae | | |
| Eurycope [truncata?] | | type specimen taken in Vineyard Sound (Richardson 1908) |
| Family Limnoriidae | | |
| Limnoria lignorum | | |
| [Sphaeroma quadridentata?] | | |
| Family Halophilosciidae | | |
| Littorophiloscia vittata | | |
| Family Chaetiliidae | | |
| Chiridotea caeca | | |
| Family Idoteidae | | |
| Edotia triloba | | |
| [Edotia montana?] | | |
| Erichsonella filiformis | | |
| Idotea balthica | | |
| Idotea metallica | | |
| Idotea phosphorea | | |
| Family Mysidae – Mantis Shrimp | | |
| Heteromysis formosa | | |
| Mysis stenolepis | | |
| Neomysis americana | | |
| Family Leptocheliidae | | |
| Leptochelia dubia | | |
| Class Malacostrata, Subclass Hoplocarida, Order Stomatopoda | | |
| Family Lysiosquillidae | | |
| Heterosquilla armata | | rare; found once in 1882 |
| Lysiosquilla scabricauda | | |
| Squilla empusa | | found in coastal ponds |
| Class Maxillopoda, Subclass Branchiura | | |
| Family Argulidae – Parasitic Fish Lice | | |
| Argulus funduli | | found on Striped Killifish |
| Argulus latus | | |
| Argulus laticauda | | found on eels and several fish species |
| Argulus megalops | | found on a wide variety of fish |
| Class Maxillipoda, Subclass Copepoda – Copepods or Fish Lice | | |
| Family Calanidae – Free-living | | |
| Calanus finmarchius | | common |
| Calanus minor | | found south of the island; pelagic |
| Neocalanus gracilis | | a tropical species occasionally brought here by the Gulf Stream |
| Mecynocera clausi | | in ocean south of the island |
| Family Aetideidae – Free-living | | |
| Gaidius brevispinus | | in ocean south of the island |
| Euchaeta marina | | common in Vineyard Sound |
| Paraeuchaeta norvegica | | in Vineyard Sound |
| Paraeuchaeta barbata | | rare; in ocean south of the island |
| Family Phaennidae – Free-living | | |
| Xanthocalanus borealis | | in ocean south of the island |
| Family Scolecithricidae – Free-living | | |
| Scolecithrix danae | | off Gay Head |
| Family Centropagidae – Free-living | | |
| Centropages bradyi | | in ocean south of island |
| Centropages hamatus | | in Menemsha Bight |
| Centropages typicus | | in Menemsha Bight |
| Family Draptomidae – Free-living | | |
| Pseudodiaptomus coronatus | | in salt and brackish water |
| Family Sapphirinidae – Free-living | | |
| Sapphirina [gemma?] | | |
| Family Temoridae – Free-living | | |
| Eurytemora americana | | in Menemsha Bight |
| Eurytemora hirundoides | | salt & brackish water; Farm Poucha and Edgartown Great Ponds |
| Eurytemora affinis | | salt and brackish water; Poucha Pond |
| Eurytemora lacustris | | brackish water; Farm and Poucha Ponds |
| Family Metridiidae – Free-living | | |
| Metridia brevicauda | | in ocean south of the island |
| Metridia luceus | | in ocean south of the island |
| Metridia longa | | in ocean south of the island |
| Pleuromamma robusta | | off Gay Head |
| Family Pontellidae – Free-living | | |
| Labidocera acutifrons | | in Vineyard Sound |
| Labidocera aestiva | | common |
| Pontella pennata | | in Vineyard Sound |
| Pontella meadii | | in Vineyard Sound |
| Family Acartiidae – Free-living | | |
| Acartia tonsa | | in Vineyard Sound |
| Acartia bifilosa | | in Vineyard Sound |
| Acartia clausii | | in Vineyard Sound |
| Acartia longiremis | | near Woods Hole |
| Family Tortanidae – Free-living | | |
| Tortanus discaudatus | | Menemsha Bight |
| Family Longipediidae – Free-living | | |
| Longipedia coronata | | in Katama Bay |
| Family Ectinosomidae – Free-living | | |
| Ectiosoma elongatum | | off Gay Head |
| Microsetella norvegica | | in Vineyard Sound |
| Microsetella rosea | | |
| Arenosetella spinicauda | | in Katama Bay |
| Family Harpactidae – Free-living | | |
| Harpacticus tenellus | | |
| Harpacticus gracilis | | brackish and salt water |
| Harpacticus chelifer | | brackish and salt water |
| Zausodes arenicolus | | Katama Bay and in ocean south of the island |
| Family Tegastidae – Free-living | | |
| Parategastes spaericus | | off Chappaquiddick |
| Family Tisbidae – Free-living | | |
| Tisbe furcata | | Nashaquitsa Pond |
| Chappaquidicka pulchella | | brackish water; type specimen from Martha’s Vineyard |
| Family Thalestridae – Free-living | | |
| Dactylopusia brevicornis | | brackish water; Katama Bay and Chappaquiddick |
| Dactylopusia tisboides | | brackish water; Chappaquiddick |
| Dactylopusia vulgaris | | near Woods Hole |
| Pseudothalestris nobilis | | brackish water; Chappaquiddick |
| Family Diosaccidae – Free-living | | |
| Diosaccus tenuicornis | | Katama Bay, Nashaquitsa Pond |
| Amphiascus obsurus | | brackish water; Chappaquiddick |
| Amphiascus longirostris | | brackish water; Chappaquiddick |
| Amphiascus pallidus | | brackish water; Chappaquiddick |
| Amphiascus parvus | | near Woods Hole |
| Amphiascus cinctus | | Sengekontacket Pond |
| Amphiascus sinuatus | | brackish water; Chappaquiddick |
| Amphiascus dactylifer | | brackish water; Chappaquiddick |
| Amphiascus hispidus | | Poucha Pond, Katama Bay, Chappaquiddick |
| Stenhelia reflexa | | off Noman’s Land |
| Family Canthocamptidae – Free-living | | |
| Attheyella bicolor | | brackish water, Chappaquiddick |
| Mesochra lilljeborgi | | brackish water; Chappaquiddick |
| Mesochra pygmaea | | Katama Bay |
| Nitocra spinipes | | brackish water; Chappaquiddick |
| Nitocra typica | | in ocean near south shore |
| Nitocra chelifer | | Katama Bay |
| Ameira simplex | | brackish water; Chappaquiddick |
| Ameira tau | | brackish water; Chappaquiddick |
| Ameira tenuicornis | | Katama Bay |
| Paraleptasticus brevicaudatus | | near Woods Hole |
| Paraleptasticus katamensis | | Katama Bay; type specimen from Martha’s Vineyard |
| Leptastacus macronyx | | Katama Bay |
| Evansula incerta | | Katama Bay |
| Family Laophontidae – Free-living | | |
| Laophonte talipes | | in ocean off shouth shore |
| Laophonte manifera | | Sengekontacket and Nashaquitsa Ponds |
| Laophonte mohammed | | brackish water; Chappaquiddick and Nashaquitsa Pond |
| Laophonte nana | | off Noman’s Land |
| Laophonte stromii | | Brackish water; Chappaquiddick and Nashaquitsa Pond |
| Laophonte cornuta | | brackish water; Chappaquiddick |
| Laophonte longicauda | | Sengekontacket Pond |
| Laophonte capillata | | Katama Bay |
| Family Macrosetellidae – Free-living | | |
| Miracia efferata | | in ocean south of the island |
| Family Cylindropsyllidae – Free-living | | |
| Stenocaris arenicola | | off Noman’s Land |
| D’Arcythomsonia parva | | brackish water; Chappaquiddick |
| Family Tachidiidae – Free-living | | |
| Tachidius brevicornis | | Katama Bay |
| Family Metidae – Free-living | | |
| Metis jousseaumei | | brackish and salt water; Chappaquiddick |
| Family Cyclopinidae – Free-living | | |
| Cyclopina agilis | | KatamaBay |
| Family Cyclopidae – Free-living | | |
| Halicyclops magniceps | | brackish water; Chapaquiddick and Nashaquitsa Pond |
| Microcyclops varicanis | | brackish water; Chappaquiddick |
| Microcyclops bicolor | | Farm Pond |
| Family Clausidiidae – Free-living | | |
| Clausidium dissimile | | Vineyard Sound |
| Family Lichomolgidae – Free-living | | |
| Macrocheiron fucicolum | | Katama Bay |
| Family Oncaeidae – Free-living | | |
| Oncaea venusta | | Menemsha Bight |
| Family Ergasilidae – Parasitic | | |
| Ergasilus manicatus | | found on Atlantic Silversides and 2 species of Stickleback |
| Ergasilus labracis | | found on Striped Bass |
| Family Bomolochidae – Parasitic | | |
| Tucca corpulentus | | found on Northern Puffer |
| Bomolochus teres | | found on Atlantic Menhaden |
| Bomolochus albidus | | found on Goosefish |
| Artacolax saetigei | | found on Tropical Two-wing Flying Fish |
| Family Taeniacanthidae – Parasitic | | |
| Anchistotos occidentalis | | found on Orange Filefish |
| Family Doropygidae – Parasitic | | |
| Doropygus pulex | | in ocean south of the island |
| Family Caligidae – Parasitic | | |
| Caligus curtus | | in Vineyard Sound |
| Caligus schistonyx | | found on Bluefish |
| Caligus rufimaculatus | | found on Banded Killifish |
| Caligus rapax | | found on many fish species |
| Caligus chelifer | | found on many fish species |
| Caligus belones | | found on Dolphin |
| Caligus mutabilis | | found on several fish species |
| Caligus pelamydis | | found on Atlantic Bonito |
| Caligus bonito | | found on Atlantic Bonito |
| Caligodes megacephalus | | found on Silver Gar |
| Lepeophtheirus thompsoni | | found on Goosefish |
| Lepeophtheirus nordmannii | | found on Ocean Sunfish |
| Family Trebidae – Parasitic | | |
| Trebius tenuifurcatus | | found on Roughtail Stingray |
| Family Euryphoridae - Parasitic | | |
| Gloiopotes ornatus | | found on Swordfish |
| Elytrophora atlantica | | found on Bluefin Tuna |
| Alebion glaber | | found on several sharks and skates |
| Alebion gracilis | | found on several sharks and skates |
| Alebion fuscus | | found on Dusky Shark |
| Alebion carchariae | | found on Spiny Dogfish |
| Alebion crassus | | found on Smooth Hammerhead Shark |
| Family Pandaridae – Parasitic | | |
| Perissopus communis | | found on several sharks |
| Echthrogaleus coleoptratus | | found on several sharks |
| Echthrogaleus denticulatus | | found on Great White Shark |
| Echthrogaleus torpedinis | | found on Atlantic Torpedo |
| Dinematura latifolia | | found on sharks |
| Pandarus smitii | | found on sharks |
| Pandarus bicolor | | found on Smooth Dogfish |
| Pandarus sinuatus | | found on sharks |
| Nesippus alatus | | found on sharks |
| Parapandarus nodosus | | found on sharks |
| Family Cecropidae – Parasitic | | |
| Cecrops latreillii | | found on Ocean Sunfish |
| Orthagoriscicola muricate | | found on Ocean Sunfish and Lookdown |
| Philorthragoriscus serratus | | found on Ocean Sunfish |
| Family Anthosomidae – Parasitic | | |
| Anthosoma crassum | | found on sharks |
| Lernanthropus paenulatus | | found on Yellowtail Amberjack |
| Lernanthropus pomatomi | | found on Bluefish |
| Lernanthropus brevoortiae | | found on Atlantic Menhaden and American Shad |
| Family Eudactylinidae – Parasitic | | |
| Kroyeria gracilis | | found on sharks |
| Kroyeria papilipes | | found on sharks |
| Kroyeria lineata | | found on sharks |
| Kroyerina elongata | | found on sharks |
| Nemesis lamna | | found on Great White Shark |
| Nemesis atlantica | | found on sharks |
| Nemesis pallida | | found on sharks |
| Eudactylina spinifera | | found on sharks |
| Eudactylinodes unicinata | | found on sharks |
| Eudactylinodes nigra | | found on sharks |
| Eudactylinella alba | | found on Roughtail Stingray |
| Family Pseudocycnidae – Parasitic | | |
| Pseudocycnus buccatus | | found on Atlantic Mackerel |
| Family Dichelesthiidae – Parasitic | | |
| Dichelesthium oblongum | | found on Atlantic Sturgeon |
| Lernaeenicus radiatus | | found on many fish species |
| Lernaeenicus affixus | | found on several fish species |
| Lernaeenicus longiventris | | found on several fish species |
| Sarcotretes lobatus | | |
| Lernaeocera branchialis | | found on Atlantic Cod |
| Lernaeolophus sultanus | | found on Filefish and Silver Gar |
| Family Pennellidae – Parasitic | | |
| Pennella filosa | | found on Swordfish and Ocean Sunfish |
| Pennella instructa | | found on Swordfish and Ocean Sunfish |
| Pennella orthagorisci | | found on Ocean Sunfish |
| Family Chondracanthidae – Parasitic | | |
| Blias prionoti | | found on Northern Sea Robin |
| Oralien triglae | | found on Northern Sea Robin |
| Pseudochondracathus diceraus | | found on Northern Puffer |
| Chondracanthus merluccii | | found on Silver Hake |
| Acanthochondria depressa | | found on Winter Flounder |
| Acanthochondria phycidis | | found on Hake |
| Acanthochondria galerita | | found on Flounder |
| Family Lernaeopodidae – Parasitic | | |
| Thysanote pomacanthi | | found on Gray Angelfish |
| Charopinus bicaudatus | | found on Spiny Dogfish |
| Clavella uncinata | | found on Atlantic Cod |
| Clavellisa spinosa | | found on Atlantic Menhaden |
| Clavellisa cordata | | found on Alewife and American Shad |
| Brachiella concava | | found on Roughtail Stingray |
| Brachiella elegans | | found on Yellowtail Amberjack |
| Brachiella gulosa | | found on Black Sea Bass |
| Family Sphyriidae – Parasitic | | |
| Paeon elongatus | | found on Dusky Shark in Menemsha Bight |
| Rebelula bouvieri | | found on Marlinspike Grenadier |
| Rebelula gracilis | | found on American Eel |
| Family Anthaecheridae – Parasitic | | |
| Philichthys xiphiae | | found on Swordfish |
| Class Maxillipoda, Subclass Thecostraca, Order Cirripedia - Barnacles | | |
| Family Lepadidae – Goose-necked Barnacles | | |
| Chonchoderma virgatum | | found off Gay Head on an Ocean Sunfish |
| Lepas anatifera | | |
| Lepas anseriffera | | |
| Lepas fascicularis | | |
| Lepas hilli | | |
| Lepas pectinata | | |
| Family Balanidae – Barnacles | | |
| Balanus amphitrite | | found on whales and ship bottoms |
| Balanus balanoides | | common |
| Balanus balanus | | |
| Balanus crenatus | | common |
| Balanus eburneus | | common |
| Family Chthamalidae – Barnacles | | |
| Chthamalus stellatus | | |
| Class Ostracoda, Subclass Podocarpa – Ostracods, Seed Shrimp | | |
| Family Cytherideidae | | |
| Cushmanidea seminuda | | |
| Cypris fasciata | | |
| Cythere dawsoni | | |
| Cythere villosa | | |
| Cytheridea americana | | |
| Cytheridea papillosa | | |
| Cytheridea punctillata | | |
| Cythereis arenicola | | |
| Cythereis [canadensis?] | | |
| Cythereis concinna | | |
| Cythereis dunelmensis | | |
| Cythereis [emarginata?] | | |
| Cythereis tuberculata | | |
| Cythereis [vineyardensis?] | | type specimen found at Martha’s Vineyard |
| [Pseudocytheretia edwardsi?] | | |
| [Xestolibris depressa?] | | |
| Family Loxoconchidae | | |
| Loxoconcha guttata | | |
| Loxoconcha impressa | | |