Borneo Suckers (Also known as the Chinese Hillstream Loach) are a small, peaceful fish growing to a maximum size of about 6cm. What Are Borneo suckers? Borneo suckers prefer a cooler water temperature, between 20 and 24o. Borneo suckers should be offered some vegetable matter. Catfish (order Siluriformes) are a diverse group of fish. Named for their prominent barbels, which ...