Glimpses into Singapore’s Crazy, Rich Shores
Volunteers who survey the waters and shores of Singapore share the surprising biodiversity they discover there.
Murky waters, barren reefs and trash-strewn beaches – these are likely the first images that come to mind when one envisions Singapore’s marine environments. Truth is, we also often stop short of exploring for ourselves what truly lies beneath the surface surrounding this tiny, island state – habitats teeming with colourful and diverse marine flora and fauna. And that comes as not much of a surprise. Singapore is geographically situated near the Coral Triangle, a marine area in the western Pacific Ocean that spans the seas of Malaysia, Indonesia, the Philippines, Papua New Guinea, Timor-Leste and the Solomon Islands. According to the World Wildlife Fund (WWF), this area is the planet’s richest in terms of marine life, with nearly 600 species of corals and six out of the world’s seven sea turtle species found here. But misconceptions about Singapore’s marine landscape often arise as a result of anthropogenic impacts, which the world’s second busiest seaport is susceptible to experiencing.
Land reclamation works at the majority of Singapore’s southern and northeastern coasts, along with its southern islands, have accounted for a total increase in the country’s land area by over 20 percent. Coastal defense infrastructure, frequent ship dredging along its channels and other extensive development projects have also led to habitat loss and coral degradation, most evident in the reduction of Singapore’s reef area from around 40km² in 1953 to a little over 13km² today.
As a result, high levels of sedimentation have reduced the visibility in surrounding waters to about 3 to 5 metres at best. Interestingly, this has not diminished the abundance of life around our shores. “Despite the sedimentation, we have actually quite a lot of diversity in our reefs,” reveals Samuel Chan, who currently studies the ecological history of local reefs at the Reef Ecology Lab of the National University of Singapore (NUS). “For example, what we find are more plating corals because those are the forms that have the most resistance against the sedimentation. Ultimately, these human activities have only increased the resilience of our reefs.”
Scientists like Chan have long gotten the support of volunteer-led initiatives like regular intertidal surveys. One example is WILD Singapore, a one-stop online platform founded by Ria Tan that catalogues facts about
Singapore’s shores. At low spring tide,
“People are shocked that these images I take of these really cool sea slugs and corals are actually all found in Singapore”
Tan’s team of volunteers will depart to survey a particular shore, visiting over 50 different sites each year. The photographs taken by volunteers are then consolidated and shared on WILD Singapore’s larger database. Jonathan Tan, a regular volunteer and student, recalls, “I cannot list the number of times people are shocked that these images I take of these really cool sea slugs and corals are actually all found in Singapore.” This citizen science initiative has since grown into a comprehensive database, testament to the richness of Singapore’s waters.
On the northern shores of Singapore such as Pulau Ubin, Changi and Pasir Ris, the constant supply of fresh water from the Johor River in Malaysia flushes the surroundings and decreases the water’s salinity. As such, unique varieties of marine species which thrive in less salty conditions can be found aplenty. Chek Jawa, which is a large intertidal flatland at the eastern tip of Pulau Ubin, was designated as a wetlands reserve and is incredibly precious because several different marine ecosystems have made the area their home. One can find mangrove forests, rocky shores, coral
rubble and seagrass meadows all in one place, providing a sanctuary for endangered flora and fauna, no longer seen elsewhere in Singapore.
To the south, not too far from the mainland, a colourful, thriving landscape of coral reefs can be found. In fact, this area was the main survey site for the Comprehensive Marine Biodiversity Survey (CMBS) launched in November 2010 and led by National Parks (NParks) and NUS, aimed at taking stock of the state of marine biodiversity in Singapore. Over three phases between 2010 and 2015, more than 10,000 specimens of flora and fauna were collected and preserved, seven species new to science were described, and more than 160 new records for Singapore were also recorded. New discoveries beneath the surface continue to be made frequently. In 2011, a living specimen of the giant Neptune’s cup
“Between 2010 and 2015, more than 10,000 specimens of ora and fauna were collected and preserved, seven species new to science were described”
sponge (Cliona patera), which was thought to be extinct for a century, was rediscovered off the coast of St. John’s Island.
The allure of Singapore’s biodiverse reefs continues to attract loyal divers and enthusiasts to get up close and personal especially with the colourful critters in another of Singapore’s southern island reefs – Pulau Hantu. Despite its forbidding name, which means “ghost island” in Malay, Pulau Hantu has grown into a favourite destination for local divers who embark on treasure hunts every weekend during their muck dives. “Muck diving” got its name from the silty substrate of reefs like those of Pulau Hantu, but remains appealing because of the wide array of sea slugs, nudibranchs, crabs, seahorses and other intriguing animals that divers can get a chance to see. The frequency of local diving in Pulau Hantu has resulted in divers, every so often, cataloguing new records of marine life via the Singapore Biodiversity Records of the Lee Kong Chian Natural History Museum. Diving enthusiast Toh Chay Hoon has been a keen contributor of these remarkable discoveries
during her trips around Singapore’s shores. “Besides finding new sea slug records at Pulau Hantu, I also made an interesting discovery of a tiny coral rubble crab that was found to be a new species to science, and subsequently described by taxonomist Professor Peter Ng and named Nursia tohae, after my last name,” Toh explains. Visitors to Singapore’s southern shores are at times also fortunate to encounter the occasional Indo-Pacific humpbacked dolphins, hawksbill and green sea turtles and white-spotted eagle rays.
Increasing focus continues to be placed on Singapore’s biodiverse waters, which has translated into a conservation imperative amongst the community here. Launched in July 2014, Singapore welcomed its first marine park – the Sisters’ Island Marine Park, which spans about 40 hectares and is home to stunning coral reefs, seagrass meadows and a safe refuge for marine biodiversity in the southern islands. In November 2018, a 10-metre-high concrete and fibreglass installation was established at Sisters’ Islands, the first of eight such structures which are part of Singapore’s efforts to create the largest artificial reef habitat to boost the variety of marine life within the area. This was one of many new and hopeful initiatives geared towards conserving Singapore’s marine biodiversity and pioneered as part of an eventful year of Celebrating Singapore Shores, in conjunction with the International Year of the Reef 2018. The need for conservation was further reinforced through the launch of the third iteration of the Singapore Blue Plan last year, which is an extensive plan put together by scientists, non-governmental organisations and volunteers. The plan makes six recommendations, including improved laws to preserve Singapore’s marine landscape and sustained funding for future research and development programmes, all of which allude to the community’s sustained commitment.
In March 2019, as the International Year of the Reef 2018 comes to a close and transitions to sustained efforts to raise awareness about Singapore’s shores, we continue to celebrate
and advocate for how Singapore lives up to its reputation as a Garden City, not just on land but also underwater. With over 250 species of hard corals, representing more than 30 percent of species in the entire world, 12 out of 23 species of seagrass in the Indo-Pacific region, 100 species of reef fish and 200 species of sponges recorded in our waters, it is clear that we are actually only scratching the surface of what lies beyond Singapore’s crazy, rich shores.
Nathaniel Soon is currently his pursuing his undergraduate studies in environmental anthropology at Yale-NUS College in Singapore. He is interested in documenting disappearing cultures, humanitarian disasters and recovery efforts and marine conservation endeavours. He is the founder of Our Seas, Our Legacy, a collective using visual storytelling to raise awareness about environmental challenges and advocate for better oceans. The collective screened its first documentary series titled Our Seas, Our Legacy, which showcases what Singaporeans are doing to conserve our marine environment, at the Singapore Eco Film Festival in November 2018.
RIGhT Ria Tan is the founder of WILD Singapore, a onestop online platform sharing interesting facts and volunteer opportunities about Singapore’s shores. mAIN Pulau Jong, or Junk Island, is a 6,000-square-metre uninhabited conical island found off the southern coast of Singapore. It is among the last untouched islands in Singapore and has a huge exposed reef flat at low spring tide. It is also one of the common sites for WILD Singapore’s intertidal surveys.
The coral cat shark, Atelomycterus marmoratus, one of several shark species in Singapore’s waters is found at Terumbu Bemban, one of the country’s southern reefs. TOP RIGhT Goniobranchus fidelis, otherwise known as the reliable nudibranch or faithful sea slug, is one of many species of nudibranchs found in the waters of the island nation. ABOVE A glittering cuttlefish found during a dive at Pulau Hantu
ABOVE Volunteers survey the exposed coral reefs of Beting Bemban Besar island, which lies off Pulau Semakau. It features sandy areas and seagrass meadows, alongside rubbly coral habitats.