Atlantic Salmon

Habitat Distribution

• Native sea-run fish once filled coastal rivers from the Hudson north through Maine; today the only remaining wild anadromous US population is a federally endangered cluster in central and eastern Maine, closed to all fishing.
• The landlocked form is the practical US fishery — native to four Maine watersheds and now stocked widely across New England, New York's Adirondacks and Finger Lakes, Lake Champlain tributaries, and parts of the Great Lakes basin.
• A cold-water obligate through every life stage: needs water in the 39-54°F range to thrive, struggles above 64°F, and cannot survive prolonged exposure above 70°F. Clean gravel for spawning and high dissolved oxygen are non-negotiable.

Specific Spots

• River fish hold in classic salmon lies — the heads of pools where current slackens into depth, boulder gardens that break flow, undercut banks in low water, and tail-outs when fish are active.
• Through summer, adults stack in shaded pools, spring seeps, and groundwater-fed runs, waiting for water to drop into the 60s before pushing toward spawning gravel.
• In lakes, landlocked fish chase smelt in the shallows during early spring, then drop to the thermocline through summer stratification and return shallow as water cools in fall.
• Spawning happens on clean, well-oxygenated riffles and runs over cobble and gravel; juveniles need complex in-stream structure — woody debris, deep pockets, coarse substrate — for the 2-4 years they spend in freshwater before smolting.