sea urchins used by the Sama-Bajau and Tausug people to make a traditional delicacy known as oku-oku or ketupat tehe tehe. This is prepared by degutting the test and then filling it with glutinous rice and coconut milk before boiling. Other uses In Okinawa, fishermen observed numerous individuals of the predatory crown-of-thorns starfish (Acanthaster planci) gathering around the remains of the internal organs of flower urchins. A follow-up study by Japanese researchers in 2001 confirmed that the viscera of flower urchins could indeed attract crown-of-thorns starfish in both aquarium and open sea experiments. The attractant compounds were isolated and identified as arachidonic acid and α-linolenic acid. The authors believe that this discovery may be used to augment population control measures of the crown-of-thorns starfish, which are highly destructive to coral reefs. References External links Video of a live flower urchin in its natural habitat (YouTube) Video of a live captive flower urchin (YouTube) Video of a flower urchin with a zebra crab (YouTube) Toxopneustidae Fauna of the Indian Ocean Fauna of the Pacific Ocean Animals described in 1816 Taxa named by Jean-Baptiste Lamarck