The Malayan Sun Bear (Helarctos malayanus) are the smallest species of bear in the world. Sun bears are farmed in Asia, extracting bile from the gall bladder via an inserted metal catheter. When they eat, bile is produced and diverted through the catheter into a container. The trade in bear gall in particular is highly profitable - dried gall can sell for 18 times the price of gold!
Zoos are increasingly recognising their role both in conservation and in education, becoming more naturalistic in environment, focusing more on species preservation and scientific research and less on entertainment. The pressure of vanishing and unprotected habitats worldwide forces the consideration of captive management, as for many species zoos are likely to be the last stop on the way to extinction.