Current rules on Sark already ban dredging, restrict trawling, and enforce closed seasons for lobsters, crabs and ormers.
Sue Daly, from La Société Sercquaise marine biology section, said: “Sark’s seas are a treasure trove of life, from eelgrass meadows to seabird colonies, and they deserve lasting protection.”
She said the new plans would “ensure these fragile habitats continue to thrive”.
Freddie Watson, Channel Islands project manager for Blue Marine Foundation, added: “A formal Marine Protected Area would place Sark firmly on the global marine protection map, ensuring its waters are safeguarded in the long term, benefitting nature, climate and generations to come.”
Chief Pleas will carry out further consultation on the committee’s recommendations.