Supporting Marine Science in Singapore: OrcaNation Instructors Join ARMS Retrieval at Kusu Island

On 17 November 2025, OrcaNation instructors Nicholas Chow and Emerson Chua supported a key marine science initiative led by the National University of Singapore, the Lee Kong Chian Natural History Museum and the Tropical Marine Science Institute. The team assisted in retrieving Autonomous Reef Monitoring Structures (ARMS) that had been placed around Kusu Island to study micro marine life.

ARMS are PVC structures designed to mimic the hidden spaces within coral reefs where tiny organisms thrive. They act as miniature, surrogate habitats, helping scientists build a clearer picture of reef biodiversity. These units form part of a global network with deployments in the USA, Thailand and Indonesia.

A Rare Glimpse Below the Surface

Visibility during the dive ranged between one and three metres, typical for Singapore’s sediment-rich waters. Even so, Nic noted how encouraging it was to see the reef thriving.

“You don’t usually expect much visibility around Singapore, but the corals really surprised us,” Nic shared. “We saw big, healthy brain corals and beautiful sea fans. It felt good to witness signs of resilience.”

Working in teams of four, the divers retrieved several ARMS units. Although sample collection was handled by the scientific team, Dr Marc Chang mentioned that Kusu Island had recorded the highest number of micro-organism samples in past years. The dive also took the team to sites that are normally closed to the public.

“It’s not often you get to explore these protected spots,” Nic said. “Being invited in to support their research felt like a real privilege.”

Supporting Marine Science and Youth Education

The ARMS programme is part of a long-term effort to monitor and understand Singapore’s marine environment. For Nic, contributing to this work echoes OrcaNation’s mission to blend education, science and a deeper appreciation for the ocean.

“As instructors we always tell our students that every small action matters. Getting involved in research like this helps us show what that looks like in the real world.”

These ARMS were installed in 2024, but Nic was unable to participate at the time due to work commitments. He and Emerson plan to continue supporting future cleaning, maintenance and retrieval sessions.

“Whenever we can help, we will,” Nic added. “It sends a positive message to the next generation, and it helps us better understand the waters we call home.”

How Divers Can Get Involved

Divers who want to support future ARMS activities must meet the following requirements:
• Advanced Open Water certification
• Strong buoyancy skills
• A minimum of 30 logged dives in local waters

Nic encourages anyone who meets the criteria to join future sessions.

“Singapore diving is unique. It challenges your skills and gives you a deep respect for the environment. If you’re keen and meet the requirements, reach out. We’re always happy to welcome more hands.”