Mobula alfredi · Myliobatiformes

Manta
Ray

Cabbage Tree Bay · Sydney · NSW

Dive deeper
The Encounter

Scepticism is a reasonable response when someone tells you there's a manta ray in Cabbage Tree Bay. The reports had started the night before — a juvenile manta, spotted entering the bay, circulating on social media before most people were awake. By the time we entered the water on the morning of December 22nd, 2024, the story had already grown. But mantas don't come this far south. Not here. Not usually. Within minutes, there it was. Small for its kind, but unmistakable. Moving through the water with a stillness that felt deliberate — gliding over us, under us, alongside us. Not skittish. Not fleeing. Just present, in the way that only a creature completely at ease in its environment can be. 

Then we noticed the hooks. 

One on the upper lip. Another embedded in the left wing. Fishing line trailing behind, a quiet reminder of where it had come from and what it had passed through to get here. One of the local swimmers reached out and detached a hook by hand — a small act, but not a small moment.

The manta stayed with us for close to four hours. It became the talking point of the summer. Locals gathered. People who hadn't dived in years came back to the water.

We haven't seen it since. Nor any other manta in this bay.

Ray
Manta Ray
Manta Ray
The Animal
01
Range
Reef mantas typically inhabit tropical and subtropical waters. Cabbage Tree Bay sits nearly 1000km south of their usual range — making this encounter genuinely extraordinary
02
Hooks
This manta carried two fishing hooks — one through the upper lip, one in the left wing — with line still attached. A local swimmer removed one by hand. The second remained.
03
Intelligence
Manta rays have the largest brain-to-body ratio of any fish. They are curious, social animals — which may explain why this one stayed close for nearly four hours rather than fleeing.
04
Vulnerability
Listed as vulnerable on the IUCN Red List. Slow to reproduce and long-lived, manta populations struggle to recover from fishing pressure, entanglement, and habitat loss.
It stayed with us for four hours. We haven't seen one here since.
Why This Matters
A manta this far south is not normal. That's exactly why it matters.
Reef mantas don't belong in Cabbage Tree Bay — at least not on any map we have. When one appears, injured, trailing fishing line, 1000km off course, it raises questions worth sitting with. What drove it south? What had it been through? And what does it mean that when it arrived, a community gathered to meet it with curiosity rather than indifference? This was a single animal, in a single bay, on a single morning. But encounters like this are how people begin to care — and caring is where conservation starts.
~1000 km
South of usual range
4 hrs
Time spent with divers
2
Hooks removed / present
Down Under Oceans
DUO
You. Ocean.
Explore more ocean neighbours

Scan to dive deeper · downunderoceans.com