The Seagull Lake is sub-coastal saline lake fed by a marine spring located in the locality of Yanerbie on the western side of the Eyre Peninsula in South Australia within the boundaries of the Sceale Bay Conservation Park.

The 88-hectare (220-acre) sub-coastal lake was reported in 2010 as being "dominated by Zostera and Ruppia marine seagrasses".

On the east the lake is bordered by about a kilometre of whipstick mallee and paperbarks, before a series of ephemeral saline wetlands.

The IBA was identified by BirdLife International because it regularly supports a breeding colony of fairy terns.

Potential threats to the colony are from disturbance by people, vehicles and dogs, water abstraction in the catchment, and fox predation.