The Kaurna people made use of the natural resources; for example, they used to trap and spear fish ("kuya"), lobsters ("ngaultaltya") and birds ("parriparu"), and also gathered bird's eggs, black river mussels ("kakirra", species "Alathyria jacksoni"), periwinkle ("kulutunumi"), river crawfish ("kunggurla" – probably common yabby), clams, native mud oysters and blue swimmer crabs. However, they did not kill the black swans, as this was forbidden. The reeds, blue flax lily and rushes (probably "Juncus kraussii", the salt marsh rush) were used for weaving baskets and nets – the latter used for not only fish, but game such as kangaroo and emu. Dolphins were known as "yambo".