Mangrove ecosystems are typically found in

tropical deltas, estuaries, lagoons or islands (more info below)

Explanation:

Mangroves commonly refer to two separate species: the coastal marsh habitat found in tropical deltas, estuaries, lagoons or islands, and the signature tree species that inhabit this habitat. Mangrove trees have also made special adaptations to harsh coastal climate conditions.

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There are 15.9 million hectares (over 60,000 square miles) of mangrove forests in the warm waters of tropical oceans all over the world. Along the Atlantic coast they are found from Florida all the way down to Argentina. Mangroves grow on both the western and eastern coasts of Africa.

Explanation: hope it helps : )