alewife (seasonal spring migratory; stocked broodstock)
banded killifish 1
American eel
American shad (seasonal spring migratory; stocked broodstock)
Atlantic salmon (seasonal fall; stocked broodstock)
black crappie
blacknose dace
blueback herring (seasonal spring migratory; stocked broodstock)
bluegill
brown bullhead
brook trout
brown trout
chain pickerel
channel catfish
common carp
common shiner
creek chub
creekchub sucker
cutlips minnow
fallfish
fathead minnow
gizzard shad (seasonal spring migratory)
golden shiner
inland silverside
largemouth bass
longnose dace
pumpkinseed sunfish
rainbow trout
redbreast sunfish
rockbass
sea lamprey
sea-run brown trout (seasonal spring migratory)
smallmouth bass
spottail shiner
striped bass (seasonal spring and fall migratory)
tessellated darter
tiger trout
walleye (rarely seen; transient from Housatonic R.)
white catfish
white perch
white sucker
yellow bullhead
yellow perch

West Branch Naugatuck River

banded killifish American eel
blacknose dace blacknose dace
bluegill bluegill
brook trout brook trout
brown bullhead brown trout
brown trout creek chub
common shiner cutlips minnow
creek chub fallfish
cutlips minnow fathead minnow
fallfish golden shiner
fathead minnow largemouth bass
golden shiner longnose dace
largemouth bass pumpkinseed sunfish
longnose dace rainbow trout
pumpkinseed sunfish rockbass
rockbass tessellated darter
tessellated darter tessellated darter white sucker
tiger trout yellow perch
white sucker

East Branch Naugatuck River

American eel
blacknose dace
bluegill
brook trout
brown trout
creek chub
cutlips minnow
fallfish
fathead minnow
golden shiner
largemouth bass
longnose dace
pumpkinseed sunfish
rainbow trout
rockbass
tessellated darter
tessellated darter white sucker
yellow perch