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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.

Susan's flatworm, Pseudoceros susanae, Norfolk Island

Susan's flatworm and the wisdom of sharing knowledge

January 22, 2024

[This post follows my mournful one from yesterday when I describe the hacking of my Facebook account by some evil random who wants a free lunch at another’s expense.]

I went #outonaswim yesterday afternoon, as I so often do. Camera at the ready, watching, observing recording. As I pottered around, something caught my eye. A piece of plastic? It was that same vivid blue of a milk bottle top, but the wrong shape and with a broader orange and narrower white stripe. Blue and orange – direct opposites on the colour wheel; it would make a striking livery for a football team or national flag!

I returned home, downloaded the images and found out its identity. I was overjoyed to discover that this critter is a Susan’s flatworm (Pseudoceros susanae). My namesake! What are the chances? Surely, with all the hassles I’d been having with identity theft and fraud on my Facebook page, this was a positive sign.

Anyway, it transpires that Ms Susan Flatworm was previously only seen in the Indian Ocean and Indonesian waters until it was first recorded on Norfolk Island in early 2021 by John Turnbull. John was on-island with the Reef Life Survey volunteers. Yesterday is the first time I’ve seen it, in five years of trawling back and forth along the length of the reef! It just goes to show how much we don’t yet know about our tiny reef as new things get discovered all the time.

It got me thinking. In the normal way of things I would be so excited by my find that I’d want – no, have – to share it immediately with the world. But I can’t. Remember – some dude has compromised my Facebook and Instagram pages, for that read taken control of them, while I am left helpless and out of the communication loop. A tricky thing for someone who breathes all things comms, all day!

Susan's flatworm, Pseudoceros susanae, Norfolk Island

I don’t want to start a new Facebook page just yet and create a world of confusion, so I’ve dutifully reported the hack and I wait. The conversation is rather one-sided, though. The silence from Facebook is deafening. Samuel Beckett’s play Waiting for Godot comes to mind. Of course, we all know Godot never comes!

I realised then that sharing knowledge is a fundamental aspect of human interaction that enriches both the giver and the receiver. Sharing and documenting knowledge ensures that valuable information and experiences are not lost but are instead preserved for future generations.

Knowledge, in and of itself, is of no worth if not shared. For me, it is like watching the idea-ripples caused by a small pebble-fact thrown into a pond. If people know and love something, they will want to save it. If they understand something, they can formulate an idea of how to save it.

Before I could share some of my knowledge (which still isn’t a whole lot, just lots of observations) I had to realise that I know nothing whatsoever about the marine environment. I started with a zero sum. As Socrates said, ‘True wisdom comes to each of us when we realise how little we understand about life, ourselves, and the world around us’.

Which is why I ask the questions, and share the answers. Hopefully some of them are right. Hopefully someone takes an interest.

I share, because it is in my DNA.

Maybe I will start a new Facebook page. I’m not sure when, but it will come.

Tags Knowledge, sharing, marine enviroment, philosophy, Facebook, hacker, hacked, flatworms
← Combine bacteria, fungi, and maybe a sponge = one toxic messFacebook fiasco – and the fishes →
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Reef space is finite, and nothing ‘shares’ it politely. This short photo essay follows one bubble-tip anemone on Norfolk Island’s lagoonal reef as it holds a crater surrounded by Montipora. The coral builds a rim; the anemone holds the centre. Six years apart, and the argument continues.

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A year in review – 2025 on Norfolk Island's reef
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Norfolk Island’s reef in 2025 – a year in review. From NOAA bleaching alerts and the UN Ocean Conference ‘Warning Signs’ series to post-drought coral recovery and a wet winter revealed in long-term rainfall records, this post captures the wins, losses, and shifting baselines beneath the lagoon. Includes reef photos, highlights from Reef Relief, and standout stories from 2025 – from coral health and disease to boxfish biomimicry, sea urchins, nudibranchs, and heat-stress signals in anemones.

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Herbicides, heritage, and an inshore reef: what happens when land management meets lagoon health
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Signs of bleaching – 8 December 2025
Dec 8, 2025
Signs of bleaching – 8 December 2025
Dec 8, 2025

I took these photographs this morning, Monday, 8 December 2025. A few warm days of settled weather, little cloud cover and low tides in the hottest part of the day have led to some early bleaching on our reef. Bleaching doesn’t always mean death for our corals, but it is concerning to have this so early in the summer season. Fingers crossed the conditions don’t last and the reef can recover.

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Nature is my teacher
Dec 3, 2025
Nature is my teacher
Dec 3, 2025

This is a thank-you note. Five years after my first Out on a swim post – written with zero marine science quals and a head full of questions – I’m still in the water, now as a PhD candidate, because an extraordinary mix of locals, volunteers, researchers and public servants decided to share what they knew. This is the story of how nature – and a very patient community – became my teachers.

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Reef grief: what dredging has done to other reefs
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Reef grief: what dredging has done to other reefs
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