The following species list has been updated (May 2013; RT Holmes) from Holmes, R. T. and G. E. Likens. 1999. Organisms of the Hubbard Brook Valley, New Hampshire. USDA Forest Service, Northeastern Research Station, General Tech. Report NE-257. 32 pp.

Family Scientific name Common name of adult Notes
Esocidae (Pike family) Esox niger Chain Pickerel Mirror Lake. Formerly numerous, current status uncertain.
Ictaluridae (Catfish family) Ictalurus nebulosus Brown Bullhead Mirror Lake. Nocturnal, young occasionally in outlet pool.
Percidae (Perch family) Perca flavescens Yellow Perch Mirror Lake. More common before sunfish introduced.
Catostomidae (Sucker family) Catostomus commersoni Common White Sucker. Mirror Lake and lower Hubbard Brook mainstem. Common but not often seen; some individuals up to 40 cm (females) spawn at public beach.
Centrarchidae (Sunfish family) Lepomis gibbosus Pumpkinseed sunfish Introduced to Mirror Lake circa 2009 by bait fishermen. Estimated population (2013) at 1300+, with 200+ spawning nests (D. Buso).
  Micropterus dolomieui Smallmouth Bass Common in Mirror Lake, apparently first introduced there in 1890s.
  Lepomis macrochirus Bluegill Mirror Lake. Introduced recently.
Cottidae (Sculpin family) Cottus congantus Slimy Sculpin Lower Hubbard Brook mainstem (currently only below gorge) and lower tributaries, such as Norris Brook. Not in Mirror Lake.
Cyprinidae (Minnow family) Rhinichthys atratulus Black-Nosed Dace. Lower Hubbard Brook mainstem.
Salmonidae (Trout family) Salmo salar Atlantic Salmon. Lower Hubbard Brook mainstem.
  Salvelinus fontinalis Brook Trout Mirror Lake, Hubbard Brook mainstem, many tributaries. Native to NH, but Pemigewasset River and Mirror Lake since 1990s; observed spawning in Mirror Lake. Native populations in upper Hubbard Brook valley (D. Buso)
  Salmo trutta Brown Trout Mirror Lake. Stocked in the Pemigewasset River (and lower Hubbard Brook) since 1990s.
  Salmo gairdneri Rainbow Trout Stocked in Pemigewasset River (lower Hubbard Brook) and Mirror Lake since 1990s. In Mirror Lake inlet streams during high flows.

(source: G.E. Likens, D. Buso, D. Warren, K. Nislow, J. Davenport)