Mobile Organisms

Image Common Name Scientific Name Category Native or Introduced Description Habitat Diet
Blackfish, Tautog image Blackfish, Tautog Tautoga onitis fish Native A stout olive-brown fish with protruding teeth and rubbery, slimy skin Associated with reefs and found close to shore in marine and brackish water Feeds on mussels, other mollusks and crustaceans
Northern sea robin image Northern sea robin Prionotus carolinus fish Native A small bottom-dwelling fish with wing-like pectoral fins and a spiny head Bottom-dwelling species occupying marine and brackish areas of 5-70m depth with sandy bottoms Has a varied diet including shrimps, crabs, other crustaceans, squid, bivalves and small fishes
Northern pipefish image Northern pipefish Syngnathus fuscus fish Native A small and slender-bodied relative of the seahorse, with a long snout, prominent eyes and a single flared dorsal fin Associates with reefs and sandy or seagrass benthic habitats Feeds on small crustaceans such as copepods and amphipods as well as larvae and fish eggs
Oyster toadfish image Oyster toadfish Opsanus tau fish Native A stout species of fish with a very large mouth and head, slimy skin and olive to brown blotchy coloration Inhabits coastal and estuarine waters on oyster or rocky reefs and other hard substrata Feeds on a variety of crustaceans, mollusks, ascidians, squid and juvenile fish
Green crab image Green crab Carcinus maenas crustaceans Introduced This species is usually found under rocks in shallow areas, has a wide carapace with five short spines behind each eye and a typically green-brown coloration Occurs primarily in intertidal and shallow subtidal areas, 0–60 m depth, common under rocks and algae, tide pools, marshes and seagrass beds, found across brackish and marine areas A generalized carnivore that feeds on a variety of bivalves, worms and other invertebrates
Other/Unknown image Other/Unknown Unlisted organism Unsure or unable to identify an organism? Please upload a description and picture of the organism here. N/A N/A
Black-fingered mud crab image Black-fingered mud crab Panopeus herbstii crustaceans Native A small crab up to 4 cm in width with brown to black claws and hairy, slender walking legs Found in brackish waters and predominantly muddy bottom habitats around oyster reefs, but can also occupy shallow rocky bottoms and marsh edges Carnivorous, feeding on a variety of bivalves, worms, crustaceans and small fishes
White-fingered mud crab image White-fingered mud crab Rhithropanopeus harrisii crustaceans Native A small greenish crab up to 2.5cm in width with white tipped claws and slender hairy walking legs Found in estuarine and brackish areas preferring mud and sandy substrates and associating with sheltering structures such as oyster reefs. Carnivorous, feeding on a variety of bivalves, worms, crustaceans and small fishes
Gammarid amphipod, scud image Gammarid amphipod, scud Gammarus spp. crustaceans Native Small translucent free-living crustaceans flattened laterally with arched backs, paired antennae and up to 15 pairs of legs Gammarid amphipods can tolerate a wide range of salinities and are found in brackish, estuarine and marine regions Their diet is usually omnivorous and they often assume a scavenging role, feeding on detritus on hard and soft substrata
Caprellid amphipod, skeleton shrimp image Caprellid amphipod, skeleton shrimp Family Caprellidae crustaceans Native Slender, small, translucent crustaceans with club-like frontal claws and grasping hind appendages, with which they grip onto algae and hold their bodies upright Found in shallow marine and estuarine areas, usually amongst and clinging to eelgrass, algae, bryozoans or hydroids Species vary in their diet and feeding preferences, with most being omnivorous filter or suspension feeders
Tube-building amphipod image Tube-building amphipod Jassa marmorata crustaceans Native A slender amphipod with brown stripes and markings that builds tubes from detritus Found in intertidal and shallow subtidal marine and brackish areas, where it builds tubes from detritus and algae fragments, binding them together with mucous secretions Diet tends to be omnivorous with a mix of detritus feeding and predation
Shore shrimp, Grass shrimp image Shore shrimp, Grass shrimp Palaemonetes spp. crustaceans Native Slender, translucent shrimp occupying shallow nearshore habitats Species (typically P. pugio) of small shrimp occupying freshwater to shallow brackish habitats, often among eelgrass or algae beds. The diet of the shore shrimp is very broad, including algae, worms, other crustaceans and even their own exoskeletons
Idotea isopod image Idotea isopod Idotea spp. crustaceans Native Large isopods with mottled coloration that do not roll into a ball when disturbed Typical species found are I. metallica and I. phosphorea. Both species occupy the rocky intertidal and shallow subtidal Detrital feeders and scavengers
Clam worm image Clam worm Nereis spp. worms Native Free-living elongate segmented worms with prominent jaws and bristles on both sides of each segment A large group of free-living polychaete worms that are often found in association with oyster beds or other shallow subtidal areas such as pier pilings and rocky reefs. Nereids can be aggressive predators on a variety of invertebrates but are also scavengers, as well as feeding on algae
Oyster flatworm image Oyster flatworm Stylochus ellipticus worms Native Pale-colored flatworm found in oyster and mussel beds Found within oyster beds or amongst other bivalves or barnacles on hard substrata in shallow subtidal marine and estuarine habitats Feeds on oysters and barnacles
Blue crab image Blue crab Callinectes sapidus crustaceans Native A large, free-swimming species of crab with long legs, the back pair modified for paddling Occupies open water in brackish areas, preferring a mud or sand substrate Omnivorous, feeding on bivalves, annelid worms, small fish and marine
Japanese shore crab, Asian shore crab image Japanese shore crab, Asian shore crab Hemigrapsus sanguineus crustaceans Introduced Often found under rocks in the intertidal, has striped walking legs Occupies shallow hard-bottom intertidal habitats and can be found on natural and artificial shorelines as well as on mussel beds and oyster reefs. It can tolerate water at a wide range of salinity values and temperatures. An opportunistic omnivore with a very broad diet in its introduced range
Corophid amphipod image Corophid amphipod Family Corophidae (commonly Corophium volutator) crustaceans Native Small, slender amphipods that build muddy detritus burrows or tubes on traps and settlement tiles Corophid amphipods often build mud or detritus burrows and can be found hiding amongst detritus and sediment both in mesh traps and on settlement tiles Omnivorous detritivores
Sea pill bug image Sea pill bug Order Isopoda, Family Sphaeromatidae crustaceans Native Stout, well-armored crustaceans with flattened bodies that roll up into a ball when disturbed Any one of a number of species of small crustaceans found in low intertidal and shallow subtidal areas on hard substrates such as oyster beds, barnacles or pier pilings. Detrital feeders and scavengers