Do fish have eyes that move independently? Well, no, not really, but, yes, sort of, in some species, sometimes!
Read on for a brief ‘Fish eyes 101’ summary of how they work.
Read MoreGreen moon wrasse, Emily Bay, Norfolk Island
A territorial banded scalyfin, Parma polylepis (aatuti), Norfolk Island
Know your damsels – multispine damselfish versus banded scalyfins
The banded scalyfins and the multispine damselfish are arguably two of the most common species in Norfolk Island’s lagoons. People often confuse them, particularly the juveniles, so here are some photos to clarify which are which. Once the differences have been pointed out, you’ll never confuse them again.
Read MoreIs this Atramentous Necrosis? This January, examples of this disease are popping up across Emily Bay on Norfolk Island
Combine bacteria, fungi, and maybe a sponge = one toxic mess
This month, I have increasingly noticed a disease that is presenting differently to the white syndrome that we have sadly become used to seeing. With this disease the coral goes grey-ish black and sometimes looks like it is almost dissolving or melting away. The result is a tragedy for the coral. I talk to coral health researcher Associate Professor Tracy Ainsworth about what is going on.
Read MoreSusan's flatworm, Pseudoceros susanae, Norfolk Island
Susan's flatworm and the wisdom of sharing knowledge
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. So that is why I share.
Read MoreCemetery Bay, Norfolk Island, at low tide
Facebook fiasco – and the fishes
Readers of this website may be familiar with my Facebook page, Norfolk Island Time, on which I cross post my blog posts about Norfolk Island's marine life. I can no longer gain access to that page. It’s been taken over by a random person hell bent on getting a free lunch. But worse is that this particular scam has been doing the rounds for years while Facebook offers little assistance. We should be angry.
Read MoreNorfolk Island’s inshore reef during low tide and at sunrise
A year in review – 2023 on Norfolk Island's reef
Sadly, the year didn’t bring any obvious improvements to Norfolk Island's reef in terms of reductions in incidences of coral disease, or runaway algal growth. And while some fish seem to have departed the scene, another species has re-established its home. Here’s a rundown of what I've been doing during the last four years of observations, and what I've seen happening on our reef in 2023.
Read MoreFree weed!
I couldn’t resist posting these beautiful images of floating seaweed. Enjoy!
Read MoreAcropora coral, Norfolk Island, 14_StairwayReef, 14 November 2021
The journey from coral reef to rubble
For two years, I have stopped by and photographed this beautiful Acropora coral formation in Emily Bay on Norfolk Island. In my database for this colony, I called the folder 14_StairwayReef; 14 for the geographic location on a map, followed by my romantic name for it. Today it is just so much rubble.
Read MoreWhite syndrome on a Hynophora pilosa colony, Norfolk Island, 23 November 2023
The spatiotemporal dynamics of a coral disease
A pictorial study of the spread of white syndrome, over time, in a Hynophora pilosa colony on Norfolk Island. This beautiful coral colony is in the middle of the channel that runs between the contiguous Emily and Slaughter Bays, in Norfolk Island’s inshore coral reef lagoon. It’s one of my favourite places to pause and admire the scenery, when I’m out on my swim.
Read MoreThe surf breaking over Norfolk Island’s reef, Slaughter Bay
The Water Rats – the Southern Hemisphere's oldest surf lifesaving club?
Can Norfolk Island claim the Southern Hemisphere’s oldest surf lifesaving club? Read on to find out more!
Read MoreThe marine algae Hydroclathrus clathratus, Norfolk Island
Sponge blob!
It’s common, wide spread around the globe, and yet I have only noticed it in recent weeks. It has been hiding in plain sight, yet this spongey algal blob, Hydroclathrus clathratus, is edible, and has been found to possess some remarkable medicinal properties. Read on to find out more!
Read MoreA bubble-tip anemone, Norfolk Island
Do sea anemones hold the key to immortality?
A close relative of corals and jellyfish, sea anemones are soft-bodied animals that ensnare passing prey with their stinging tentacles. No one really knows how long they can live, but in the wild they are thought to live for more than a hundred years. They have some clever adaptations that contribute to their longevity. Maybe they can teach us their secrets for a long life!
Read MoreAcropora corals, Norfolk Island’s reef
Brown? Yes. Boring? Definitely not!
Norfolk Island’s reef is one of Australia’s most southerly. It isn’t showy like the Great Barrier Reef, and I often hear the comment that it is a little dowdy – boring and brown. I’m here to tell you that it is anything but.
For this little photo essay I randomly selected just a handful of my many ‘boring, brown’ coral images to demonstrate my point. I barely scratched the surface of my photo library, yet I think you will agree, the diversity is just amazing!
Read MoreA Norfolk Island endemic species, the Norfolk Island blenny, Parablennius serratolineatus
Atlas of Living Australia recognises iNaturalist observations for Norfolk Island
After about 18 months of asking, and with the help of some wonderful people from the data department of the Atlas of Living Australia and the Australian Museum, the Atlas of Living Australia website now recognises iNaturalist citizen science observations for Norfolk Island. Which is definitely something worth celebrating!
Read MoreOld Military Barracks after heavy rain, November 2020
The clock is ticking for Norfolk Island’s reef
Three years ago, on 31 July 2020, we woke after a night of torrential rain to a scene of devastation in Emily Bay on Norfolk Island. Arguably one of the most beautiful bays in the world was a fetid, smelly mess caused by the raw sewage that had flowed from the poorly maintained sewerage works and private septic tanks, down the hill and into the bay. Read on to find out what has happened since that dreadful day.
Read MoreEmily Bay, full moon rising, by Norfolk Island photographer Joelene Oliver
Full moon, low tides and Norfolk Island’s reef
With the low, low tides associated with a full moon, the bays on Norfolk Island are like a huge, calm swimming pool, giving us some great snorkelling opportunities. These low tides should also let us view the causeway, which will no doubt be exposed too. This post explores these opportunities as well as what the low tides mean for corals. Read more in this fact packed blog post.
Read MoreA small school of scissortail sergeants with one interloper, an Indo-Pacific sergeant, Norfolk Island
Same, same, but different – confusing fish identities
There are a few fish species in Norfolk Island’s bays that are easily mixed up. Here’s four commonly confused pairs, with a few pointers to help you identify them.
Read MorePurple velvet sea star, Leiaster leachii, as it broadcasts spawn into the water column, Norfolk Island
Casting your offspring to the currents – sea star reproduction
In May on Norfolk Island, the day after the full moon and at low tide, I witnessed an enormous Leach’s sea star, Leiaster leachi, as it broadcast its gametes into the water column. What an amazing WOW moment! And what a privilege to witness such a rare event. Here are some images and video of the action.
Read MoreClose-up of the underside of the acropora coral colony after being toppled in a storm
The resilience of corals
On Norfolk Island’s reef, acropora coral colonies upturned in storm surges in September 2020 initially struggled to survive, but now they are now showing signs of new, healthy growth. This incredible photo is of those early days as it struggled. You can read more and see what it looks like today in my latest blog post, here.
Read MoreCrustose coralline algae, Norfolk Island
Pretty in pink – the real coral reef builders
Animal, vegetable or mineral? What are crustose coralline algae? Are they important? What role do they play on our coral reefs?
There’s a lot to learn about coralline algae. For a humble lifeform, they really pack a punch.
Read More