Qualla: Hamelin Pool Marine Nature Reserve

Hamelin Pool Marine Nature Reserve: Introduction

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Phil Whitehouse from London, United Kingdom, CC BY 2.0. They look like rough, dark boulders scattered in shallow water, unremarkable at first glance. Walk the boardwalk at Hamelin Pool and you are looking at something close to the oldest form of life on Earth still building structures: stromatolites, layered mounds constructed grain by grain by cyanobacteria, the same class of organism that produced most of the oxygen in our atmosphere over three billion years ago. Hamelin Pool, tucked into the eastern arm of Shark Bay in Western Australia, holds the most diverse assemblage of living marine stromatolites anywhere in the world.

Image: Phil Whitehouse from London, United Kingdom | CC BY 2.0

Hamelin Pool Marine Nature Reserve: Three Billion Years of Practice

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Donald Hobern from Copenhagen, Denmark, CC BY 2.0. Stromatolites form when cyanobacteria -- among the simplest organisms capable of photosynthesis -- trap fine particles of sand, crushed shell, and sediment in their sticky filaments. The bacteria cement these particles with calcium carbonate they produce themselves, building the ...

Image: Donald Hobern from Copenhagen, Denmark | CC BY 2.0

Hamelin Pool Marine Nature Reserve: Why Here, Why Now

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit C Eeckhout, CC BY 3.0. Stromatolites were once common in shallow seas worldwide, but competition and grazing by more complex organisms made them increasingly rare. At Hamelin Pool, a quirk of geography and chemistry has kept them alive. The Wooramel Seagrass Bank, an underwater prairie 130 km long, she...

Image: C Eeckhout | CC BY 3.0

Hamelin Pool Marine Nature Reserve: Oil Men and Ancient Life

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Allison Coleman, CC BY-SA 4.0. The stromatolites of Hamelin Pool were discovered in 1956 by surveyors working for an oil exploration company -- the first living examples ever identified of structures built by cyanobacteria. The reserve that now protects them covers 1,270 square kilometers of marine habitat wit...

Image: Allison Coleman | CC BY-SA 4.0

Hamelin Pool Marine Nature Reserve: Walking Among the Oldest Living Things

Fri, 27 Mar 2026 00:00:00 GMT

Photo credit Ben Cordia, CC BY-SA 4.0. Access is simple and free. A side road from Highway 353, about 30 km west of the Overlander Roadhouse on the North West Coastal Highway, leads to the telegraph station grounds. From there, an interpretive boardwalk extends over the shallows, allowing visitors to examine the strom...

Image: Ben Cordia | CC BY-SA 4.0