Found in a variety of habitats from sheltered intertidal areas down to deeper waters up to 35 metres. They attach themselves to boulders, rock crevices, reefs, seagrass beds and muddy bottom. Urchins graze on seagrass and algae and can form aggregations known as barrens.
Not commonly targeted by recreational divers in Tasmania though often observed in depths up to 15 metres. The purplish exoskeleton is found by beachcombers washed up around the Tasmanian coast, usually without the spines.
Take care if handling as their fragile spines can puncture skin and remain embedded.
The roe is edible but its quality can vary seasonally.