 This thesis was challenged as a mythical "romancing of the landscape" by Anne Clarke, one that confused natural processes with socially crafted infrastructure.However, fresh archaeological work by Heather Builth led to her contending that they had a sophisticated system of aquaculture and eel farming.They built stone dams to hold the water in these swampy volcanic areas, especially the area comprising the lava flow of the "Budj Bim" volcano, creating ponds and wetlands in which they harvested short-finned eels ("kuyang" or more commonly "kooyang").