Clifton Gardens Seahorses: Will Wharf Upgrades Affect Them?
Could the Clifton Gardens wharf refurbishment impact endangered seahorses living in Mosman's Chowder Bay?
By Rita Bratovich
Chowder Bay, near Clifton Gardens in Mosman, is home to an unusual conservation success story - and an important question about how marine infrastructure upgrades can coexist with fragile underwater habitats.
The area has been a focus of the Sydney Seahorse Project, a conservation program aimed at rebuilding populations of White's Seahorse (Hippocampus whitei), an endangered species once relatively common in Sydney Harbour.
In 2019, wild White's Seahorses were collected from the swimming net for a captive-breeding program. The following year, artificial habitats known as "seahorse hotels" were installed on the seafloor, providing places for seahorses to shelter, breed and attach themselves. Captive-bred juveniles have subsequently been released into the area.
The seahorse project is still going. Meanwhile, the historic Clifton Gardens Baths and Jetty is undergoing major refurbishment. Works commenced in August 2026 and include
renewing the concrete decking, replacing timber piles and upgrading the jetty access steps.
Because seahorses can live on piles, swimming nets and other marine structures, construction inevitably raises questions about potential disturbance. Swimmers and recreational divers have been advised not to enter the water near the construction area while works are underway.
The issue highlights the complexity of maintaining Sydney Harbour's ageing infrastructure while protecting the marine life that has made these structures home. For White's Seahorse, conservation is not simply about protecting individual animals; it also means maintaining the habitat they rely on.
For now, there is no publicly available evidence that the Clifton Gardens upgrade will permanently damage the area's seahorse habitat. But with an endangered species conservation project operating in the same waters, careful environmental management and ongoing monitoring will be important as the refurbishment progresses.
