Nearly Half the World's Reef Corals Are in Trouble
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Those of you who know me know I've spent a lot of time underwater. A lot of it with an actual tank on my back. Most of it at my desk, following Fin Fleming around a reef while she tries to take a nice picture and sometimes ends up finding a body instead.
So when I saw a headline saying nearly half the world's reef-building corals are at risk of extinction, I read it twice. Then I read it again.
What Did They Find?
The IUCN (the folks behind the Red List of threatened species) just finished a new check-up on reef-building corals. They looked at 892 species. Of the 774 they had enough data on, 44% are now threatened with extinction. That's 340 species.
Back in 2008, it was about one in three. So, definitely not heading in the right direction.
The breakdown: 33 Critically Endangered, 251 Endangered, 56 Vulnerable. The main culprit is climate change. For more than 90% of the species in the worst shape, warming water is what put them there.
And here's the part that made me wince. The data only goes through 2020. It doesn't include the big global bleaching event from 2023 to 2025. The scientists themselves say the real number is probably higher.
Our Side of the Ocean Is Worse
If you dive the Keys or the Caribbean, pay attention to this one. Half of Atlantic coral species are threatened. In the Indo-Pacific, it's 43%. Not a contest you want to win.
Those are the reefs I love most. They're also the ones Fin dives.
Many places, like the Cayman Islands, have declared the nearby waters a marine park, but even that can't protect the reefs forever, since all the world's oceans connect.
Why Does a Mystery Writer Care?
Reefs aren't just pretty scenery in my books. They're where Fin works. Where she finds clues. Occasionally where she finds trouble.
When I write a dive scene, I want you to see the color and the fish and all that busyness a healthy reef has. What I see when I dive. That gets harder to write honestly when the real thing keeps changing. Fiction can freeze a reef in time. The ocean can't.
I hope you fall in love with the reef in my books and then help look after the real one.
What Can You Do? (No Lab Coat Required)
You don't need a degree in marine biology. A few small things add up.
- Dive and snorkel gently. Watch your fins, keep your hands to yourself, tuck in your gear. Coral grows slowly and breaks fast.
- Pick dive operators who care. Lots of shops in the Keys and Cayman support reef restoration. Ask before you book.
- Support the people doing the work. Coral nurseries and restoration groups can always use donations and volunteers.
- Talk about it. Most people will never see a reef in person. Your photos and stories matter more than you think.
Your Turn
Have you watched a reef change over the years you've been diving or snorkeling? Tell me in the comments. And if you'd like to visit a reef without getting wet, Fin's adventures start with In Deep.