The giants red blossom, the Rafflesia , which can grow to over 170 cm in diametre are the most exotic and rare flora in Kinabalu National Park, besides pitcher plants of all shapes. Besides birds, small mammals such as squirrels and bats also can be found in the park. With typical shoreline vegetation and a large numbers of mammals and birds dwell on the islands, Tunku Abdul Rahman Park definitely attracted nature lovers. For divers, the best reefs are around Manukan, Mamutik and Sulug Islands, while they can found excellent reef patches between Sapi and Gaya Islands. The coral within the park are in a different species with a variety of colour and shades.
Coral reefs are home to many kinds of fish which also in their brilliant colours.
The islands are about 160 hectares big and 5.3 km in circumference. From geological aspects, Sipadan Islands evolve from a volcanic eruption, when andesite lava piled up a volcanic cone about 2,600 feet high from the bottom of the sea. Over the millennium, the coral colonized it, till it becomes a coral reef as today. With its endearingly human facial characteristic and actions, Orang Utan, which means 'man of the forest', is a protected species as a precaution against their possible extinction in the wild. The Sepilok Orang Utan Sanctuary located at Sepilok Forest Reserve, which covers an area of 4,000 hectares, provides the Orang Utan with a protected environment.