Hinchinbrook Island lies just off the coast between Ingham and Cardwell. It’s a National Park, with strict limits on camping and (usually) a waiting list of walkers wanting to hike the Thorsborne Trail. Its inner (western) coast is a shallow mangrove-fringed channel, while its outer (eastern) coast is spectacularly beautiful, with rugged mountains rising behind a series of sandy beaches. Those beaches, sadly, accumulate as much marine debris as our mainland beaches.
Tangaroa Blue Foundation is a relatively new environmental NGO, an “Australia-wide not-for-profit organisation dedicated to the removal and prevention of marine debris,” as their website says. They keep themselves busy: their events page lists, for example, 19 days of beach clean-ups in October alone.