Missionary Bay is a vast, biodiverse estuary system forming the northern section of Hinchinbrook Island National Park on Queensland's Cassowary Coast. This remote and pristine saltwater environment is characterized by approximately 50 square kilometers of dense mangrove forests, winding tidal creeks, and expansive mudflats, creating a rich nursery and feeding ground for a wide array of marine life. The bay is part of the larger Hinchinbrook Channel system and is renowned for its exceptional wildlife, including dugongs, turtles, dolphins, and significant bird populations. Access is primarily by boat from the mainland, offering anglers a true wilderness fishing experience focused on iconic tropical estuary and nearshore species.