is a 244 km² shallow coastal lagoon
on the northern shores of Prince Edward Island
, about 10 km north of the town of Summerside
. It was classified as a wetland of international importance
via the Ramsar Convention
on April 28
. It consists of marine and coastal wetlands ranging in altitude from sea level to 8 m. It is protected from the Gulf of St. Lawrence
by a sandspit and dune formation that stretches 25 km. Small rivers and creeks are the source of freshwater for the lagoon.
It is "important for supporting large nesting colonies" of herons and cormorants, and is a meaningful nursery area for fin and shell fishes. Malpeque oysters are prized by connoisseurs.
The bay is currently a recreational area, especially at Cabot Beach Provincial Park and Green Park Provincial Park. There is some concern regarding development of the area and its surroundings; for example, a petition to stop a wind energy project in the Malpeque Peninsula was submitted to Natural Resources Canada. The recreational use of the area is a "threat to nesting and brood-rearing Piping plovers"