Add leaflet layer between land and sea. Is it possible. Please help!!!

[midhun palatty]

We want to display Emission Control Areas on the map. But we want it to be displayed on Water and not on land. Since there are somany small islands falling in the ECA areas, drawing a polygon will cover the land area of the island and make it hidden. we want the land area to be visible and have the water around it to be marked. The idea we have come up is to have a leaflet layer inserted between the the land and water on the map. Is it possible. does windy have any provision do achieve that result. Please help!. Thanks in advance.