Candy-cane stripes, long white feelers, and a reef spa on offer – the banded coral shrimp waves its antennae to advertise cleaning services to passing fish.
Read MoreA banded coral shrimp, Stenopus hispidus, Norfolk Island
Mr Lemonhead, the yellow boxfish (Ostracion cubicus) 8 August 2025, Norfolk Island
Biomimicry: How a Boxfish Caught Mercedes Benz’s Eye
Meet Mr Lemonhead – our lagoon’s teeny yellow boxfish with a big design legacy. He inspired a Mercedes Benz concept car, proving how nature is full of surprises. And he shares the lagoon with other critters whose tricks have also shaped real-world inventions.
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Paragoniastrea on Norfolk Island’s reef
Patchwork Corals: How Colonies Fuse to Form Living Mosaics
Some corals wear more than one colour for a reason. When Paragoniastrea australensis colonies fuse early in life, they form living mosaics. A beautiful reminder of coral cooperation on Norfolk Island’s reef.
Read MoreReef relief
Today, 28 July, is World Nature Conservation Day. After the dry 2024, Norfolk Island’s reef is looking healthier – a brief reprieve as less water - laden with nutrients - flowed into the lagoon. These photos show what’s possible. It’s a reminder that recovery is within reach – though renewed runoff could quickly undo the gains.
Read MoreParagoniastrea australensis, Emily Bay, Norfolk Island
Emily Bay's big 'brain' coral
In Emily Bay, Norfolk Island, a single coral bommie – Paragoniastrea australensis – has stood for decades as a micro-reef, harbouring diverse marine life and local memories. Once photographed in 1988 and still thriving today, it remains a keystone of reef biodiversity and a living link between past and present.
Read MoreBluebarred Parrotfish – Scarus ghobban, first recorded in Norfolk Island’s lagoons in February 2021
Biodiversity matters
Over five and a half years of snorkelling Norfolk’s lagoon, we’ve documented 23 fish species not previously recorded in this area. Some are local ghosts, others climate migrants. These observations help us understand and protect what makes our reef so special.
Read MoreNepean Island (left) and Phillip Island (right) to the south of Norfolk Island are free of rats. Rat-free seabird rookeries are important for the health of coral reefs.
Poop power
Not all poop on a reef is bad poop. In fact some kinds of poop can be a reef’s most important invisible engine. Fish poop, bird poop – even poop that gets eaten again by other fish – all of it keeps the ecosystem ticking over in a way that’s nothing short of extraordinary.
Read MoreGlimpses of recovery: what the reef could be if we let it
Day 6 of this photo series from Norfolk Island coincides with the final day of the UN Ocean Conference in Nice. After a week of documenting decline, today’s post offers a different view – what reef recovery can look like when conditions improve. Drought in 2024 gave the reef a break, and the results were unmistakable: healthier corals, lower disease, and more fish. This is what’s possible if we act.
Read MoreI wrote about this massive coral in a blog post ‘The Ancient Massives’, 20 March 2022
Warning signs: quiet and unnoticed collapse of two coral colonies
Day 5 of my blog series for the UN Ocean Conference: two long-lived coral colonies in Norfolk’s lagoon died quietly from disease. No drama – just slow collapse and overgrowth by algae. A reminder that not all reef losses are loud, but they are happening.
Read MoreHynophora pilosa colony, Norfolk Island
Warning signs: what Norfolk Island’s reef is telling us
Day 4 of a week-long photo series from Norfolk Island, shared during the UN Ocean Conference in Nice. Today’s post spotlights a Hydnophora pilosa colony where white syndrome appeared suddenly and spread quickly, taking out around a quarter of the coral. In the months that followed, algae quietly filled the gap – a subtle but telling shift from coral to algae that’s happening across the reef.
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Lone Pine, Emily Bay, Norfolk Island
Warning signs: coral disease takes hold
In Day 3 of this blog post series, published while leaders gather at the UN Ocean Conference in Nice, we see Norfolk Island’s coral reef lagoon quietly delivering a stark warning: recurrent land-based pollution, coral disease, and delayed decisions are dismantling this ecosystem in real time.
Read MoreAn Acropora coral colony, Emily Bay, Norfolk Island, showing early signs of growth anomalies
Warning signs: coral growth anomalies – the slow cancers of the reef
Day 2’s post coinciding with the UN Ocean Conference looks at coral growth anomalies – sometimes called coral ‘cancers’. These slow-moving diseases quietly weaken coral colonies, making them far more vulnerable to storm damage and algal takeover. On Norfolk Island’s reef, I’ve watched this exact process play out over several years. This is how chronic stress silently dismantles coral ecosystems.
Read MoreHealthy montipora coral, Norfolk Island
Warning signs: shifting baselines on Norfolk Island’s reef
Today is World Ocean Day — a timely moment to launch my week-long blog series on Norfolk Island’s reef. Each day this week, I’ll be sharing photo essays that document the slow but steady pressures reshaping this fragile reef. Today: how shifting baselines make us blind to what we’ve already lost.
Read MoreA view across to the inshore reef, Slaughter Bay, Norfolk Island
The Governance–Government Vacuum: Norfolk Island’s Forgotten Ecology
A personal reflection on Norfolk Island’s coral reef environment, political denial, and what John Wyndham’s The Kraken Wakes can still teach us about slow-moving disasters — and why this election matters more than ever.
Read MoreCute as buttons – Astrea curta
Astrea curta corals are ‘small, moderately plocoid [flattened], distinct, and almost circular’ . Normally grey-green in colour, you can see from the images here, ours are often beautiful rich gold, although they do vary. They have a neat growth habit and button-like corallites, which can grow in columns, spherically or flattened. Large colonies of these can form gorgeous undulating bumps.
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Slaughter Bay, Norfolk Island, March 2020
From 'Watch' to 'Warning'
Last week, the chance of coral bleaching in Norfolk Island’s inshore lagoons was raised from ‘Watch’ to ‘Warning’ and will more than likely rise to Alert levels one and two in coming weeks. So why do I worry about water quality all the time when bleaching seems inevitable these days and so the reef is probably doomed anyway? Read on to find out.
Read MoreFrom little things – watching them grow
Small numbers of different fish species is not an unusual phenomenon on Norfolk Island’s reef, but it does demonstrate what a tiny, precious, coral reef ecosystem we have, when we can count individuals on one hand and watch each of them grow, like these little blackeye thicklips, a member of the wrasse family.
Read MoreEmily Bay at low tide, early morning, December 2024
A year in review – 2024 on Norfolk Island’s Reef
It is five years since I began wielding a camera underwater in Norfolk Island’s lagoons and my third ‘year in review’ for this ‘Out on a swim’ blog. And what a journey it has been. At least this year I have some great news to report, but – a bit like a curate’s egg (partly bad and partly good) – there are also some downers. Find out what 2024 has meant for Norfolk Island’s reef.
Read MoreEchidna nebulosa, snowflake moray, Norfolk Island
A smooth and slippery echidna
How did the snowflake moray get its proper (scientific) name Echidna nebulosa, and what does it have to do with Australia’s famous and iconic marsupial, the echidna? Read on to find out more …
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Feisty zingers! Focus on the 'brain' coral, Paragoniastrea spp.
If corals had characters, then the Paragoniastrea spp. would be described as feisty, or even downright aggressive when it comes to asserting itself over its neighbours. They are also rather colourful.
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