July 2026

Monthly Reef Update

This month has been another reminder of both the challenges and momentum across the Great Southern Reef. From seaweed restoration and reef monitoring to southern calamari research and the disappearance of South Australia's giant Australian cuttlefish from their famous breeding aggregation, this edition highlights some of the latest stories from across the GSR.

The Wire: What happened to South Australia's giant cuttlefish?

The disappearance of South Australia's giant Australian cuttlefish from their regular aggregation site was recently the focus of an interview on The Wire, Australia's independent current affairs radio program, which is broadcast on community radio stations across the country.

Whyalla dive operator Mani Katz and GSRF Creative Director Stefan Andrews discuss what this unprecedented season has meant for the local community, tourism operators, and one of Australia's most remarkable wildlife events.

The seven-minute conversation explores the questions scientists are now trying to answer, why understanding the full extent of the harmful algal bloom matters, and what needs to happen next to help South Australia's marine ecosystems recover.

Take A Listen

The conversation has also continued this week, with an opinion piece published in InDaily highlighting what's at stake if this globally unique breeding aggregation fails to recover, and why long-term monitoring and research are now more important than ever.

Reef Resilience Comes To Yorke Peninsula

Last Friday, the Great Southern Reef Foundation officially opened the Yorke Peninsula edition of the SA Reef Resilience Photo & Art Showcase in Ardrossan. A packed town hall welcomed artists, photographers, scientists and community members to celebrate the beauty of the Great Southern Reef and the people working to better understand and protect it.

Congratulations to our 2026 People's Choice Student Award winners:

Secondary School: Lauren McIntosh (Year 12), Ocean Trio

Primary School: Maeve Tilbrook (Year 1), Self Portrait

Can small seaweed patches help rebuild marine forests?

A new long-term study explored an approach known as applied nucleation, testing whether small crayweed patches can trigger recovery at much larger scales.

Read how researchers put the idea to the test, and what it could mean for restoring seaweed forests across the Great Southern Reef.

Reading Reef Change Through DNA

Some of the pressures affecting reefs are difficult to detect using a single monitoring method. In this new article, we explore how environmental DNA complements established reef monitoring methods, detecting different patterns of reef biodiversity associated with environmental and pollution gradients.

The findings show that combining eDNA with established survey methods can provide a more complete understanding of reef ecosystems and help improve how we monitor and protect the Great Southern Reef.

Australia's tropical and temperate reefs face remarkably similar challenges from native "prickly" species that can transform healthy reef ecosystems into degraded reefs when their populations grow unchecked.

A new review brings together decades of research on crown-of-thorns starfish and longspined sea urchins, showing that preventing outbreaks and barrens before they become established is far more effective than responding after widespread reef degradation has occurred.

Why Prevention Is Better Than Cure for Australia's Reefs

Despite the ecological and economic importance of the Great Southern Reef, direct management funding to manage longspined sea urchins remains a fraction of that directed towards crown-of-thorns starfish on the Great Barrier Reef.

Read The Conversation article and explore the full research paper.

Banking Seaweed for an Uncertain Future

Australia's underwater forests are disappearing as marine heatwaves become more frequent and intense. But could "seaweed biobanks" help safeguard the genetic diversity needed to restore them in the future?

In this new article for The Conversation, researchers explain how cryopreservation and living collections of seaweed are being developed as an insurance policy for some of the Great Southern Reef's most important habitat-forming species, offering hope for future restoration in a rapidly warming ocean.

Understanding Spawning for the Future of Southern Calamari

Southern calamari stocks have declined in parts of Tasmania, prompting scientists and fishers to work together to better understand where and when these iconic squid spawn. A new IMAS-led project is combining environmental data, fishery information and local knowledge to better understand spawning patterns and the environmental and fishery impacts on southern calamari stocks.

The research will support future management decisions and help protect important spawning habitats. Learn more about this FRDC-funded project and how researchers are working to better understand southern calamari spawning.

Dr Karl Explores the Hidden Power of Seaweed

Dr Alexandra (Alex) Campbell is an Australian marine ecologist and science communicator based at the University of the Sunshine Coast. She specialises in seaweed ecology, kelp forest restoration, marine microbiomes and climate change, and is one of Australia's leading researchers on the role of seaweeds in healthy coastal ecosystems.

In this engaging episode of Shirtloads of Science, Dr Karl sits down with marine ecologist Dr Alex Campbell to unpack the surprising biology of seaweeds, the impacts of climate change on underwater forests, and the growing role seaweed could play in climate solutions.

Forests Without Names: Second Kelp Forest Naming Workshop

Following the success of the inaugural workshop at South Coogee, Forests Without Names recently held Australia's second community kelp forest naming workshop at Freshwater Surf Life Saving Club on Sydney's Northern Beaches.

Local residents, ocean users, researchers and community representatives came together to learn about the remarkable kelp forest off Freshwater and collaboratively develop names that reflect its ecological, cultural and local significance. The workshop generated a fantastic shortlist of proposed names, which are now being reviewed by the Metropolitan Local Aboriginal Land Council before progressing to a public vote. This workshop marks another exciting step in an international effort to recognise and celebrate underwater forests through community-led naming.

AMSA Honours Great Southern Reef Researchers

Two members of the Great Southern Reef Research Partnership have been recognised at the 2026 Australian Marine Sciences Association (AMSA) Awards, celebrating outstanding contributions to marine science in Australia.

Dr Dominic McAfee (University of Adelaide) received the AMSA Emerging Leader in Marine Science Award for his leadership in marine restoration research, while Antonia Cooper (University of Tasmania) was presented with the AMSA Technical Award, recognising two decades of excellence in marine ecosystem monitoring, scientific diving and research operations.

Thanks For Supporting Us

As we begin a new financial year, we'd like to thank everyone who supported the Great Southern Reef Foundation over the past 12 months. From our research and community partners to our Friends, Champions, Guardians and individual donors, your support helps us share stories, connect people with marine science and grow appreciation for Australia's Great Southern Reef.

If you'd like to support our work this year, we'd love to welcome you to our community of monthly supporters. You can join as a Friend, Champion or Guardian, or make a one-off donation equivalent to 12 months (or more) to receive the same supporter benefits.

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