Paste your INCI list
Ingredient-by-ingredient verdict
If your sunscreen has only non-nano zinc oxide or non-nano titanium dioxide as the active, plus a short plant-oil / beeswax base, you're good for Fiji reefs. Anything with oxybenzone, octinoxate, octocrylene, or the word nano before zinc/titanium is not.
How to read the verdicts
Banned (red) ingredients are documented coral-toxicants: oxybenzone causes planulae (coral larvae) to encyst at concentrations as low as 62 parts per billion — lower than the level found in a single swimmer's wake at a busy reef. Octinoxate and octocrylene do similar damage at slightly higher thresholds. PABA is rarely seen today but still on some "old formula" shelves. Microplastic scrub beads (polyethylene, polypropylene) end up in reef filter-feeders.
Avoid (orange) ingredients lack the published coral-larvae evidence, but read like they shouldn't be on a reef — nanoparticles of ZnO/TiO2 (anything under 100 nm) cross coral cell walls and have been shown to disrupt symbiosis in lab studies. Non-nano (i.e. >100 nm particle) is the threshold the International Coral Reef Initiative and Haereticus Environmental Laboratory use to define "reef-safe" mineral filters.
Caution (yellow) ingredients (homosalate, octisalate) are not formally banned but appear on watch-lists — they're endocrine-active in fish and there's a slow-evidence cycle underway. OK (green) are plant oils, waxes, tocopherol (vitamin E), shea butter, aloe — they're not perfect (still oil on water) but they biodegrade and don't bioaccumulate in coral tissue.
Limits
- Detects known reef-toxic ingredients only. New UV-filters come to market faster than the toxicology is published. If you can't pronounce half your bottle, that's a smell-test, not a verdict.
- Doesn't check percentage. A "trace" of a banned ingredient isn't the same as 10% — but most regulators say the toxic threshold is below 1% anyway.
- Doesn't model wash-off chemistry. Even a "clean" sunscreen contributes surfactant foam to the water column. Reef-safe is not no-impact.
- Doesn't account for skin type. If you're Fitzpatrick I–II (very fair), a mineral-only filter can leave you burned at the surface — bring a long-sleeve rashie instead.
- Not a substitute for shade, hats, and rashguards — which are the more effective intervention by an order of magnitude.
FAQ
Is Fiji actually banning sunscreens?
As of 2025, Fiji has a national ban on oxybenzone and octinoxate in marine-protected areas, mirroring Palau, Hawaii, Aruba, Bonaire and the US Virgin Islands. Enforcement is patchy in resort areas but real at high-traffic reefs. The list is expected to widen — pack reef-safe from home to stay ahead.
What does "non-nano" actually mean on a label?
Particles larger than 100 nanometres (0.0001 mm). On a label it's written as "Non-Nano Zinc Oxide" or "Non-Nano Titanium Dioxide". If the label just says "Zinc Oxide" without the non-nano qualifier, treat it as nano. Reputable reef-safe brands (Badger, Thinksport, Stream2Sea, All Good) explicitly label it.
Can I buy reef-safe sunscreen in Fiji instead of flying it in?
Sometimes, at resort shops and a few pharmacies in Nadi / Suva, but the price markup is significant (often 2–3× the US/AU price) and the depth of stock is unreliable in the outer islands. Bring it from home — your favourite brand ships internationally.
What about spray sunscreens — are they reef-safe?
Almost never. The propellant in aerosols is volatile organic compounds, and the spray deposition itself is uneven (more on the skin, more drifting into the water). Mineral sticks, mineral lotions, and zinc-oxide tinted moisturisers are the practical alternatives.
- • International Coral Reef Initiative (ICRI) — 2018 oxybenzone coral-toxicity statement
- • Haereticus Environmental Laboratory — coral-larvae planulae encysting studies
- • Fiji Department of Environment — marine protected-area sunscreen rules
- • Tourism Fiji 2025 visitor guide — reef-safe packing notes
- • NOAA coral reef watch — UV-filter reef monitoring summaries