Are There Sharks or Eels in Niagara Falls? No—Environment Too Extreme

No sharks or eels inhabit Niagara Falls. The physical conditions are incompatible with their survival.

Why Not?

• Extreme turbulence: 2,800 m³/s over Horseshoe Falls creates chaotic, aerated, high-velocity flow—lethal to fish not adapted to it.
• Pressure changes: Plunge pool depths (~50 m) and violent upwelling cause barotrauma.
• Temperature: Cold (near 0°C in winter, ~20°C summer)—sharks need warmer/temperate; eels catadromous but avoid such chaos.
• No salinity: Freshwater. Bull sharks tolerate fresh water but not this hydraulic violence.
• Migration barrier: Falls are absolute upstream barrier. No fish ascends them.

What Fish Are There?

• Below falls (Lower Niagara): Steelhead, salmon, lake trout, smallmouth bass, walleye, muskie—popular sport fishery.
• Above falls (Upper Niagara/Lake Erie): Perch, bass, pike, sturgeon (recovering).
• In the plunge pool: Only accident victims—fish going over falls (stunned/died). "Fish rain" occasionally reported downstream.

American Eel Note

American eel (Anguilla rostrata) lives in Lake Ontario and tributaries—but cannot pass Niagara Falls. They're catadromous (breed in Sargasso Sea), but the falls block access to upper Great Lakes. Eel ladders exist on some dams, not the Falls.

Niagara Falls is a geological and hydraulic barrier, not a habitat. Sharks and eels belong to calmer waters.