A deep body of water, about 40% of it is deeper than 2,000 m. Its deepest part near its eastern portion is about 5,000 m. The western part of the Gulf is shallow, less than 200 m deep, with extensive mangroves and coral reefs (Zamboanga del Sur and Zamboanga Sibugay provinces). Within the Gulf is the Illana Bay (Ref. 106380).
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cfm script by eagbayani, 23.12.02 ,
php script by cgarilao, 15/10/08 ,
last modified by sortiz, 06.27.17