Known. Stone channels at Budj Bim were built to catch eels.
Budj Bim is in Victoria. The Gunditjmara people's ancestors made channels, dams, and pools from basalt about 6,000 years ago. The works link a volcano and Lake Condah to marshes that run toward the sea. Eels, called kooyang, could be held in the pools, while younger ones could slip away. After a fire, a hidden channel about 25 metres long was seen in the grass.
The page says a village of stone houses stood beside the traps, but it only says this is believed to be the only lasting settlement of its kind.
https://www.ancient-origins.net/news-history-archaeology/budj-bim-0012261