To focus expertise, wisdom and enthusiasm for the benefit of Moreton Bay
They are only about the length of credit card, can change colour to match their surroundings, and spend much of their lives clinging quietly to seagrass, sponge or soft coral with their curled tails.
But White’s Seahorses are not just charming little fish. They are also telling us something important about the health of our coastal waters.
That is why new Queensland Government support for University of Queensland researcher Rowan Carew’s White’s Seahorse survey work is such welcome news for Moreton Bay.
Rowan, a PhD candidate at UQ’s School of the Environment, has been leading work to better understand White’s Seahorses in South East Queensland — where they are found, what habitats they use, how populations are connected, and what threats they face. The work is supported through the Queensland Government’s threatened species research programs, with the latest round backing the next stage of research into artificial habitat deployment in South East Queensland.
For a species that has long been better studied in New South Wales than in Queensland, this is a big step.
A species we still know too little about
White’s Seahorse, Hippocampus whitei, is endemic to Australia’s east coast. It occurs in shallow coastal and estuarine habitats, including seagrass meadows, sponge gardens, soft corals, jetty pylons and other structures where it can hold on and avoid being swept away.
In New South Wales, the species is often known as the Sydney Seahorse. It has been the focus of substantial research and recovery work after serious declines were recorded in places such as Port Stephens and Sydney Harbour.
In Queensland, however, the picture has been much less clear.
We know White’s Seahorses occur in South East Queensland. We know Moreton Bay contains the seagrass meadows, estuarine habitats and complex marine environments that could support them. But until recently, there has been very little detailed information on how many there are, where the strongholds might be, how Queensland populations relate genetically to those in New South Wales, and which habitats are most important for their survival.
That is the gap Rowan’s work is helping to fill.
Her project combines field surveys, habitat mapping, population genetics, citizen-science sightings and conservation planning. In practical terms, that means turning scattered observations into usable knowledge: where seahorses are being found, which habitats they prefer, how resilient populations may be, and what recovery actions might actually work in Queensland conditions.
Why this matters for Moreton Bay
For The Moreton Bay Foundation, this work sits neatly within a bigger story: Moreton Bay is not just a scenic backdrop to South East Queensland. It is a living system of international, ecological, cultural and economic importance. The Bay supports seagrass meadows, mangroves, saltmarshes, coral communities, shellfish reefs, turtles, dugongs, dolphins, shorebirds, sharks, rays and countless smaller species that often receive less attention but are vital to the system.
White’s Seahorses belong in that second category — small, easily overlooked, but ecologically meaningful.
Because seahorses depend on structurally complex habitat, their presence can tell us something about the condition of the places they live. They need something to hold onto. They need food. They need shelter. They need water quality and habitat conditions good enough to support the small animals they feed on and the seagrass, sponge, coral or artificial structures they use. In that sense, looking for seahorses is also looking closely at the Bay itself.
This is one of the reasons research matters. Good conservation is not built on assumptions. It is built on evidence: field data, mapped habitats, long-term monitoring and carefully tested restoration tools.
Sydney had to rebuild habitat. Queensland still needs to find out what we have.
In New South Wales, White’s Seahorse conservation has already moved into recovery mode. After declines in places such as Sydney Harbour and Port Stephens, scientists began using “seahorse hotels” — temporary artificial structures that give seahorses something to hold onto when natural habitats have been damaged or lost.
Queensland is at an earlier stage. We know White’s Seahorses occur in South East Queensland, including Moreton Bay, but we still do not know enough about where they are, how many there are, or which habitats matter most. That is why Rowan Carew’s work is so important. Once we understand what we have here, we can look more confidently at what has worked elsewhere — and decide what conservation tools, if any, are right for Moreton Bay.
Citizen science can help
One of the lovely things about this project is that the community can contribute. People who see White’s Seahorses in South East Queensland can help by recording sightings, taking clear side-on photographs where it is safe and appropriate to do so, and submitting those observations to the research team. Rowan also shares updates through Instagram at @seeing_seahorses.
As always, the welfare of the animal comes first. Seahorses should not be handled, moved, chased or disturbed for a photograph. A respectful observation is far more valuable than a close-up taken at the animal’s expense.
Small animals, big responsibility
Moreton Bay’s future will not be secured by one project, one species or one grant. But this work is exactly the kind of science-based conservation the Bay needs more of: targeted, collaborative, practical, and focused on turning knowledge into action. White’s Seahorses may be small, but the questions they raise are large. Are our seagrass meadows healthy enough? Are our estuarine habitats resilient enough? Are we protecting the places that small, specialised marine animals need to survive? And are we willing to invest in the research required to make good decisions before species decline beyond easy recovery?
Thanks to Rowan Carew and the growing White’s Seahorse Queensland Conservation Project, Moreton Bay now has a better chance of answering those questions.
And perhaps, if we look carefully enough among the seagrass, one of the Bay’s smallest threatened species might help us see the bigger picture more clearly.
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