Commercial Dive Fishery
A number of different species are collected by the commercial dive fishery; the major species being sea urchin and periwinkles. The commercial dive fishery also provides access to some developing fisheries such as clams and other fisheries based on exotic species, notably introduced Pacific oysters and the Japanese kelp undaria.
http://dpipwe.tas.gov.au/sea-fishing-aquaculture/commercial-fishing/commercial-dive-fishery
image: periwinkles