The island of Tasmania has long been renowned for producing some of Australia's tastiest seafood.

But when warming seas allowed a foreign species of sea urchin to move farther south, devastating valuable fisheries, local businesses tried to innovate and ended up fostering a new industry whose products are popular overseas, including in Japan.

Located about 30 minutes south of Hobart, the state capital, Ralph's Tasmanian Seafood began processing sea urchins in 2017 as an experiment when wild abalone stocks were declining due to an infestation of long-spined sea urchins.