The Saco River's Diverse Habitat


The Saco River is home to a diverse array of wildlife habitats — from tidal clam flats and marshes to impoundments and fast-flowing sections of river.


The tidal section of the Saco River at low tide.


Many of the tributaries along the Saco River provide spawning habitat for migratory fish species that play a critical role in the food chain for wildlife throughout the Saco River Basin.



The lower section of the river — the estuary — is home to the most diverse fish populations, and is a primary area of focus for state agencies and research universities studying the ecosystem.


Migratory Ocean Fish:

  • River Herring
  • Shad
  • Sturgeon
  • Striped Bass
  • Atlantic Salmon
  • American Eels


Freshwater Fish:

  • Native Brook Trout
  • 3 species of Mummichog


Other areas of study include phytoplankton, eel grass, coastal erosion, and more.