Photographing Euastacus hystricosus
The upper Brisbane River
Euastacus hystricosus is Queensland’s largest giant spiny crayfish species. It is a crayfish covered in numerous sharp spines that grows to a huge size. Found in the upper reaches of the Mary and Brisbane rivers, the ACP has been researching this amazing species.
Much of the time we are just weighing, measuring and then photographing and releasing freshwater crayfish but we need to catch the critters before we can do so.
Paul scoops a small crayfish from the stream
Paul and Rob photographing small crayfish along the stream edge
E. hystricosus blend in well with both the stream bed and surrounding forest floor
Rob with a smaller E. hystricosus
Paul with a larger E. hystricosus
Paul and I camped that night in the forest so we could survey the streams at night to gather biological information. E. urospinosus became more active as the night deepened but E. hystricosus became less active.
A chunk of fish tied to a string attracted dozens of crayfish
E. hystricosus love fish and are reluctant to let it go
Paul with an Euastacus hystricosus
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Tagged australian aquatic biological, Australian Crayfish Project, Euastacus hystricosus, Freshwater crayfish, Mary River, Paul Van der Werf, Rob McCormack