Marine Animals

Wild Common Seal Moult Welfare

The annual moult of common seals is a physiologically demanding period when they require undisturbed haul-out access for thermoregulation.

Key Facts

Common seals moult in August-September, replacing their entire coat over 4-6 weeks
During moult seals reduce activity and increase haul-out time for thermoregulation
Disturbance during moult causes unnecessary energy expenditure in an already stressful period
Post-moult seals begin intensive feeding to rebuild reserves before winter
Moulting seals that cannot haul out risk hypothermia and poor coat replacement

Welfare Considerations

Common seals disturbed repeatedly during the moult period face additional physiological stress during an already demanding transition. August-September disturbance at haul-out sites has welfare implications that are distinct from the pupping season. Year-round protection of haul-out sites from disturbance protects seals through all phases of their annual cycle.

What You Can Do

Maintain distances from seal haul-outs throughout the year
Advocate for year-round seal haul-out protection requirements
Support Marine Conservation Society seal monitoring and protection