Pulau ubin island’s chek jawa wetlands’ mangrove boardwalk

From the lushness of the sea grass around the mangrove roots, the walk changed into a quagmire of mud and what appeared to be anthills. I soon discovered that these muddy mounds which could sometimes be as high as three metres, were the work of mud lobsters that burrowed through the slush to extract rich organic matter. They acted like earthworms by mixing up and aerating the soil. Additionally, the mounds provided habitats for other animals such as crabs, spiders and snakes.