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Norfolk Island's Reef

Discover a fragile paradise – Norfolk Island's beaches, lagoons and coral reef
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Out on A Swim

‘Out on a swim’ is a coral reef blog that tells the stories of the characters who live under the waves and what has caught my eye when ‘out on a swim’ in the lagoons of Norfolk Island. It is also a record of the difficulties Norfolk Island’s reef faces, like many others around the world, as a result of the poor water quality that has been allowed to flow onto it.

This page shows the most recent blog posts. For the complete catalogue, visit the ‘Out on a swim index’ page.

This blog is rated in the Top 20 Coral Reef Blogs in the world.

A Norfolk Island endemic species, the Norfolk Island blenny, Parablennius serratolineatus

Atlas of Living Australia recognises iNaturalist observations for Norfolk Island

August 16, 2023

It may seem unimportant, irrelevant, or downright nit picky, but back in March 2022 I contacted the Atlas of Living Australia because I’d noticed an anomaly in their dataset feeds from iNaturalist.org. Let me explain.

As you may be aware if you read my Facebook page, I upload my observations to that platform in order to help me identify species and so we have a record of what is living here on Norfolk Island. iNaturalist is a global platform. Similar to iNaturalist, you can also upload your observations to the Atlas of Living Australia, which is the preeminent Australian platform. Now I don't know about you, but I don’t have the time or resources to be sitting here duplicating my uploads. However, very conveniently, ALA has a handy form that you can tick, which allows you to opt in and have your iNaturalist observations migrated across to the ALA, just like that. Easy peasy.

Except for here on Norfolk Island there seemed to be a roadblock, and our observations weren’t recognised as being from Australia.

Now putting politics aside about the status of Norfolk Island, why is it important that our observations are included in the ALA?

Because. Science + research. That’s all. As it says on the ALA website:

“Citizen science is becoming an increasingly significant and important contributor to the pool of data being used to create a more accurate picture of our biodiversity and ultimately advance scientific knowledge.”

...

“BioCollect fills a significant gap in data collection tools, supporting scientists wanting to engage the public in their research and the public wanting to participate in important scientific work, including collecting their own observation data.”

Which comes back to a question I often ask: how can you protect something when you don't know what it is? Well, you can't.

Which is why I fired off emails at semi-regular intervals to anyone I thought would listen.

Anyway, today, 16 August 2023, thanks to the wonderful people at the Australian Museum and at the ALA, citizen science data from the external territories of Australia, including Ashmore and Cartier Islands; Christmas Island; Cocos Keeling Island; Coral Sea Islands; Heard and McDonald Islands; and Norfolk Island have finally been included for anyone who opted in for this to happen. Needless to say, I am over the moon.

The photo above is of the Norfolk Island blenny, Parablennius serratolineatus, which, incidentally, is only found in a 20 km radius of Norfolk Island, so it’s a pretty special little guy. Moreover, I used to see these down at the pier end of Slaughter Bay all the time, but haven’t spotted any since February this year (2023), despite looking out for them any time I’m snorkelling at that end.

Cemetery Bay, Norfolk Island

In Biodiversity Tags Citizen science, iNaturalist, observations, Atlas of Living Australia, Australian Museum, biodiversity, endemic species, Environment, environmental protections, Environmental protection
← Brown? Yes. Boring? Definitely not!The clock is ticking for Norfolk Island’s reef →
Featured
Aglow among the spines
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Aglow among the spines
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Ever seen a sea urchin that seems to glow blue from the shadows? That’s Diadema savignyi showing off its reef shimmer. Beautiful, a little spiky, and definitely not to be messed with.

Oct 25, 2025
The funky seventies sea slug – Halgerda willeyi
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The funky seventies sea slug – Halgerda willeyi
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If ever a sea slug was channeling the 1970s, it’s Halgerda willeyi. With its groovy orange lines and chocolate-brown bumps, it looks straight out of a vintage lounge suite – the kind with shag pile carpet and bold floral cushions. Proof that nature was nailing retro design long before humans caught on.

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This Haddon’s anemone has been quietly living in the middle of Norfolk Island’s Emily Bay for years, bleaching and recovering with the seasons. Like corals, sea anemones host microscopic algae that provide most of their food. When stressed by heat or rainfall changes, they lose colour – and tell a story about seasonal changes to the weather.

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Honoured to be featured
Sep 30, 2025
Honoured to be featured
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I left school in the UK nearly 50 years ago, so it was a pleasant surprise to be invited to share some images and take part in an interview for an article about my work, to be published in the annual glossy magazine the school now produces. Here is the end product.

Sep 30, 2025
Celebrating Biodiversity Month on Norfolk Island
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September is Biodiversity Month – the perfect time to celebrate the astonishing variety of life on Norfolk Island’s reef. From new fish sightings to coral mosaics, every observation is a reminder of how much there is still to learn and protect.

Read more about why biodiversity matters, globally and right here in our lagoon.

Sep 7, 2025
The fate of a coral colony when it succumbs to white syndrome – four years on
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The fate of a coral colony when it succumbs to white syndrome – four years on
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I’ve tracked one plating Acropora coral from 2021 to 2025. In just a few weeks, white syndrome wiped it out. Nearly four years years on, it’s still smothered in algae and sea squirts, with only the tiniest hint of new growth. It’s a stark reminder: without tackling the root cause, we’re just watching the same sad story repeat itself.

Aug 24, 2025
The Candy-Striped Cleaner Keeping the Reef Healthy
Aug 17, 2025
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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.

Aug 17, 2025
Biomimicry: How a Boxfish Caught Mercedes Benz’s Eye
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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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Patchwork Corals: How Colonies Fuse to Form Living Mosaics
Aug 3, 2025
Patchwork Corals: How Colonies Fuse to Form Living Mosaics
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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.

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Reef relief
Jul 28, 2025
Reef relief
Jul 28, 2025

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.

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