Blog

Diving for a Difference

1,000+ Invasive Species Removed from Port Phillip Bay

Over the past 10 months, the Australian Diving Instruction (ADI) community has made waves beneath the surface of Port Phillip Bay and not just with our fins. Thanks to the dedication of our divers and volunteers, we've successfully removed more than 1,000 invasive species from the bay, a remarkable milestone that highlights the power of collective action and the deep care our community has for our marine environment.

Tackling Invasive Species

Invasive marine species pose a serious threat to the health of our oceans, often outcompeting native plants and animals and disrupting delicate ecosystems. Among the key species targeted by our divers were Undaria pinnatifida (commonly known as Japanese kelp) and the Northern Pacific seastar.

Both of these species spread rapidly if left unchecked. Undaria, an aggressive seaweed, forms dense underwater forests that smother native habitats, while the Northern Pacific seastar preys on shellfish and other invertebrates, threatening biodiversity and impacting local fisheries. By removing these invaders, our divers have helped protect the bay's natural balance, ensuring native species can thrive.

Adopt a Site: Stewardship in Action

As part of our ongoing commitment to ocean conservation, ADI is proud to be a PADI Adopt a Dive Site Ambassador, with St Helens and St Leonards identified as key sites of importance. This program empowers divers around the world to take direct responsibility for their local underwater environments, and we're thrilled to see the results in our own backyard.

Beyond invasive species removal, our team has also contributed to marine debris clean-ups, hauling everything from discarded fishing gear to everyday plastics out of the water. Each piece of debris removed prevents further harm to marine life, whether it's a seahorse that might have become entangled or a seabird that could have mistaken plastic for food.

Community Power Beneath the Waves

What makes these achievements truly special is the community spirit driving them. Our divers and volunteers donate their time, energy, and passion to improving the health of Port Phillip Bay. Every dive is a chance not only to explore the beauty of our underwater world but also to safeguard it for the future.

These efforts also ripple beyond the water. By sharing our results, we hope to inspire others, divers and non-divers alike to consider the impact of their choices on the marine environment. Whether it's joining a dive, reducing single-use plastics, or supporting conservation initiatives, everyone has a role to play in protecting our oceans.

Looking Ahead

While we're proud of the progress made so far, our mission is far from over. Invasive species and marine debris remain ongoing challenges, but with the continued dedication of our diving community, we know we can make a difference.

Together, we're not just diving for fun, we're diving for a purpose. The waters of Port Phillip Bay are healthier today thanks to these efforts, and with ongoing care, they will remain a thriving marine haven for generations to come.

Corinne
Open Water Scuba Instructor
16 Sep 2025

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