• Home
    • Algae
    • Corals
    • Eels
    • Everything Else
    • Kingston, Norfolk Island
    • Nudibranchs, Sea Slugs and Flatworms
    • Octopuses
    • Out On A Swim Index
    • Reef Fish
    • Sharks
    • Sea Anemones
    • Sea Stars
    • Sea Urchins and Sea Cucumbers
    • Turtles
    • Underwater
    • Videos
  • Out on a swim - blog
  • About
  • Contact + Subscribe
Menu

Norfolk Island's Reef

Discover a fragile paradise – Norfolk Island's beaches, lagoons and coral reef
  • Home
  • Explore
    • Algae
    • Corals
    • Eels
    • Everything Else
    • Kingston, Norfolk Island
    • Nudibranchs, Sea Slugs and Flatworms
    • Octopuses
    • Out On A Swim Index
    • Reef Fish
    • Sharks
    • Sea Anemones
    • Sea Stars
    • Sea Urchins and Sea Cucumbers
    • Turtles
    • Underwater
    • Videos
  • Out on a swim - blog
  • About
  • Contact + Subscribe

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.

Hannah and Trish with Doris

Doris – it takes a village

January 20, 2023

Transformed, Transformational

This morning marked the end of a four-month journey for Doris. From a sick, emaciated turtle with lesions across her shell, and covered with an unhealthy growth of algae, she has been transformed to glossy beautiful health. In a bittersweet moment for all of us who were there and who have been involved in her care, she was released into the waters off Blackbank, to the north of Norfolk Island, not far from Captain Cook’s monument today.

If you missed the beginning of this wonderful story, back in September 2022 Doris was plucked from Emily Bay on Norfolk Island looking sick and sad. You can read all about it in these two blog posts:

  • #operationdoris – Green Sea Turtle Rescue

  • #operationdoris – Update From Australian Marine Parks

In Greek mythology, Doris is a sea goddess who represents the fertility of the ocean – the goddess of the rich fishing grounds found where fresh water mingles with the brine. It seemed an apt name for our little turtle found, as she was, where the freshwater stream mixes with the salty waters of Emily Bay, hiding under a coral ledge, sick, weak and underweight.

Over the last four months, Doris has gone from being quietly submissive, to gradually asserting herself. Her personality quickly became evident and surprised us all; she told us in no uncertain terms what she wanted and didn’t want. Like a child, she would reject her greens, ignore us when she had had enough company, but then love having her back scratched. As she got better she became decidedly cranky, pacing back and forth in a tank that seemed to shrink around her as her personality shone. The call of the wild asserted itself. It was time.

Not only has Doris been transformed to health by a hard-working group of amazing local volunteers, but, I believe, she has proved transformational for many of us, too. The privilege of, and responsibility for, being able to care for a wild animal and to see her blossom into health is an experience many of us will never forget as long as we live.

Doris has taught us all something. She has touched our lives, educated us, informed our opinions, made us all so much more convinced that we can’t let this happen again to another turtle, to other wildlife. She has touched our lives; especially, she has talked to our schoolchildren – our future environmental custodians. Doris has alerted us to a problem in our waters like nothing and no one else could. And for that we owe her a big debt of thanks.

This morning, Hannah and Trish cradled Doris for her last journey, aboard Dave Biggs’s boat to an area of water that we considered would be a good clean habitat for her. We headed out to Blackbank, where we paused while Luca readied himself to enter the water to film this special moment. The ocean breathing gently around us as we waited – the mood quiet, sombre.

View fullsize September 2022
September 2022
View fullsize January 2023
January 2023

As we soaked in the moment, wildlife warrior, and our resident bird expert Margaret Christian, reminded us of a song her daughter Kath King had written some 15 years ago, presciently about a turtle at Blackbank.

‘Let’s sing it’ said Nat Grube, an islander, Doris volunteer and film crew.

And she did.

It was spontaneous, unscripted, and one of the most beautiful moments of my life.

Hannah slid Doris over the side and back into the bosom of the ocean, her home. We’ll miss her, but as she swam towards Luca, our hearts sang, too. She’s back where she should be, and hopefully she will now find her way in the world and, with luck, mature and breed, doing her little bit for the world’s endangered population of green sea turtles (Chelonia mydas).

Mission accomplished.

And maybe, just maybe, I will be lucky enough to see her one day on one of my snorkels. I hope so. My camera will be ready.

Vital statistics

We believe Doris is around 10 years old.

Her curved carapace length is 48.5cm. And she weighs about 13.5 kg, a marked increase from when she arrived into our care at just shy of 9 kg.

Special thanks

They say it takes a village:

Nigel Greenup (National Parks), Hannah Taylor, Jenny Gildert (from the Cairns Turtle Rehabilitation Centre), Trish Le Mura, Candice the vet, Jamie Donaldson, all the Parks staff, Australian Marine Parks, Natalie Grube, Luca Fox, all the volunteers (so many of you, and such special people), and Dave Biggs. And, of course, every member of the Norfolk Island community who volunteered fish, greens, ointment, water tubs, courier services – and on and on it goes.

This really was a monumental effort for a small community. Thank you.

View fullsize 325604127_1295664850999789_3856967983655423391_n.jpg
View fullsize 325970978_1588093904986915_5260604108180888930_n.jpg
View fullsize Hannah with Doris, just before release
Hannah with Doris, just before release
View fullsize 325197353_555270936480714_2711821354110925394_n.jpg

Luca waiting to film Doris off Blackbank

In Environmental degradation Tags Green sea turtle, Doris, Turtle rescue, water quality
← Sea hares – our submarine shreksCitizen science: your observations can be powerful →
Featured
18 Jun 2025 (20)_crop.jpg
Mar 7, 2026
Alveopora or flowerpot coral – how to tell the difference
Mar 7, 2026

They look alike at first glance, but Alveopora and flowerpot corals are not the same. The easiest way to tell them apart is to count the tentacles.

Mar 7, 2026
Norfolk’s lagoonal reef – the 2025 report, in plain English
Feb 27, 2026
Norfolk’s lagoonal reef – the 2025 report, in plain English
Feb 27, 2026

We now have the 2025 Norfolk Island reef health report, so I’m taking the opportunity to translate it into plain English here. Sadly, it’s more of the same story in Emily and Slaughter Bays – a reef that can cope with some stress, but is being asked to cope with too much, too often.

Feb 27, 2026
Halimeda’s night shift – why this reef algae changes colour
Feb 20, 2026
Halimeda’s night shift – why this reef algae changes colour
Feb 20, 2026

Halimeda is a calcareous green reef alga that forms new segments overnight, shifts from white to bright green by dawn, then pales again as calcification begins. A quick look at one of the reef’s smartest algae.

Feb 20, 2026
Reef real estate – a bubble-tip’s six-year stand-off
Jan 11, 2026
Reef real estate – a bubble-tip’s six-year stand-off
Jan 11, 2026

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.

Jan 11, 2026
A year in review – 2025 on Norfolk Island's reef
Dec 28, 2025
A year in review – 2025 on Norfolk Island's reef
Dec 28, 2025

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.

Dec 28, 2025
Herbicides, heritage, and an inshore reef: what happens when land management meets lagoon health
Dec 15, 2025
Herbicides, heritage, and an inshore reef: what happens when land management meets lagoon health
Dec 15, 2025

Herbicide use near Emily, Slaughter and Cemetery Bays raises questions about inshore reef health, heritage land management, and environmental protection on Norfolk Island.

Dec 15, 2025
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.

Dec 8, 2025
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.

Dec 3, 2025
Reef grief: what dredging has done to other reefs
Nov 30, 2025
Reef grief: what dredging has done to other reefs
Nov 30, 2025

From Miami to Fiji, from Dubai to tiny village harbours on atolls, dredging near coral reefs has left a long trail of scars – even on ‘small’ projects. This follow-up to last week’s Kingston post walks through real examples of what happened elsewhere, and what that should make us think about before we dig up our own reef.

Nov 30, 2025
To dredge or not to dredge? The Kingston Pier channel project
Nov 20, 2025
To dredge or not to dredge? The Kingston Pier channel project
Nov 20, 2025

How much risk are we really taking with the planned dredging at Kingston Pier – and how much protection do our corals actually have on paper? This piece walks through what the federal approval does and doesn’t guarantee, explains why sediment and light matter so much to the reef, and asks the hard questions we need answered before we trade a deeper channel for a shallower future.

Nov 20, 2025

Latest Posts

© 2026 All rights reserved.