Reef World Map
Travel guides & inspiration
Latest posts
Parasitism and Disease on Coral Reefs: Vectors, Villains and Cleaners
A closer look at reef parasites, the pathogens that afflict corals, and the cleaning partnerships that keep fish and reef alive.
The Farmer Fish: How Damselfish Cultivate Algae Gardens on the Reef
Small, pugnacious and endlessly busy, damselfish carve out patches of reef and cultivate them into productive gardens of algae.
Reef Soundscapes: How Sound Guides Coral Larvae Home
Coral reefs are surprisingly noisy places, and that noise turns out to be a homing signal for the tiny larvae searching for somewhere to live.
Reef Fluorescence and the Art of the Fluo Night Dive
A practical look at coral biofluorescence and the gear and technique behind a proper fluo night dive.
Read more →Herbivory and the Battle Against Algae
On a healthy reef, an unseen workforce of grazers decides whether coral or seaweed wins the fight for space.
Read more →Parrotfish and the Making of Reef Sand
A close look at the crunching, scraping fish that quietly manufacture the sand beneath tropical seas.
Read more →The Lionfish Invasion: How an Indo-Pacific Predator Conquered the Caribbean
The story of how the Indo-Pacific lionfish spread through the western Atlantic and Caribbean, and what divers can do about it.
Read more →Crown-of-Thorns Starfish Outbreaks and the Reefs That Fight Back
A close look at why crown-of-thorns starfish erupt into outbreaks, the harm they do, and the control work now underway on reefs.
Read more →Symbiodinium and the Coral-Algae Partnership
A look at the microscopic algae that feed reef-building corals and turn stress into bleaching.
Read more →Clipperton Atoll: Isolation and Endemism at the Edge of the Pacific
How the most isolated coral ring in the eastern Pacific became a living laboratory for endemism and survival.
Read more →Kingman Reef: A Window Into What Coral Reefs Once Were
Far out in the central Pacific, Kingman Reef preserves a reef ecosystem so intact that sharks and other predators still dominate it.
Read more →Niue Deep Dive: Clear Water, Sea Kraits and Living Limestone
A closer look at Niue, the raised coral island where rainwater filters through limestone and leaves the sea almost impossibly clear.
Read more →Rainbow Reef and the Somosomo Strait: Diving Fiji's Soft-Coral Capital
Tidal currents squeezing between Taveuni and Vanua Levu feed the famous soft corals of Rainbow Reef — here is how the strait works and how to dive it well.
Read more →Astrolabe Reef: A Deep Dive Off Kadavu, Fiji
Far south of Fiji's main tourist trail, the Great and North Astrolabe reefs ring Kadavu with tidal passes, coral walls and manta cleaning stations.
Read more →Chesterfield Reefs: Diving the Coral Sea's Forgotten Frontier
Far out in the Coral Sea, the Chesterfield Reefs remain one of the least-visited coral systems on Earth, shaped by isolation and scale.
Read more →