The reef off Koh Ma is actually recovering — 23% coral growth in two years

We write a lot of "here's what's broken" news on this site — road repairs, ATM fees going up, that kind of thing. So it's genuinely nice to write one that's just... good news. The reef around Koh Ma, the little tidal-sandbar island off Mae Haad that half the island walks out to at low tide, is recovering. Not "holding steady." Recovering.

The numbers

Marine biologists from Prince of Songkla University have been monitoring the reef and are reporting 23% coral recovery over the past two years. If you've snorkelled there a few years apart, this tracks with what a lot of long-term residents have been saying anecdotally — more colour, more fish, less bleached-looking coral than the mid-2020s.

What's actually driving it

A few things stacked on top of each other, as far as we can tell:

• The AGC Vinythai Coral Cultivation Project launched in March 2026 — a partnership between AGC Vinythai, the Coral Conservation Foundation, the Department of Marine and Coastal Resources, and the CORE Sea Institute, specifically focused on restoring reef around Koh Phangan.
• The island's single-use plastic bag ban, in place since January 2025 — most shops now default to paper or reusable bags, and it's genuinely stuck rather than quietly fading out.
• Weekly volunteer cleanups — Trash Heroes Koh Phangan runs regular beach cleanups, and Clean Phangan does one every Tuesday. These aren't huge, dramatic events, just consistent, unglamorous work that adds up over two years.

The honest caveat

Nobody's pretending the reef is "fixed" or that climate change has stopped being a threat — warming water is still the long-term risk to any reef in the Gulf of Thailand, and one good two-year trend doesn't cancel that out. But 23% recovery is a real, measured number, not a marketing line, and it's the kind of result that makes the volunteer cleanup crews' Tuesday mornings feel worth it.

If you want to see it yourself

Koh Ma is reachable on foot across the sandbar from Mae Haad beach at low tide — bring your own mask and fins, or rent from one of the beach shacks. Please: don't stand on the coral, and don't take any home as a souvenir. It's taken two years of real, monitored work to get this recovery — worth not undoing it for a photo.