 Archeological remains of Makasar contact, including trepang processing plants from the 18th and 19th centuries, are still found at Australian locations such as Port Essington and Groote Eylandt, and the Makasar-planted tamarind trees (native to Madagascar and East Africa).Slow-moving creatures related to sea stars and sea urchins, sea cucumbers are found on the sea floor.As such, trepanging is accomplished by spearing, diving, dredging or simply picking the animals up by hand when they are exposed at low tide.