Many fish seen in a canal in Singapore?

On 10 December 2025, people walking near a canal in the Yishun–Sembawang area saw something surprising. A big group of dark fish was swimming very close together in the shallow water. From far away, the fish looked like one long moving shape.

Many people stopped to watch because they do not usually see so many fish in a neighbourhood canal. What kind of fish were they?

Experts said the fish were likely sagor catfish. These fish usually live near the sea, but they can also swim in rivers and canals. They can live in both salty water and fresh water, so they are able to travel to different places.

The canal where the fish were seen is connected to other waterways that lead to the sea. This makes it possible for sea fish to swim into the canal.

Why did the fish swim into the canal?

The fish probably followed the water flow. When tides change or water levels rise, fish may swim along with the moving water. The fish also swim together in groups to stay safe and help each other move. This is normal behaviour for these fish. It does not mean they were lost.

Why is this important to understand?

Seeing fish in canals reminds people that Singapore’s waterways are connected to nature. Canals are not just for water — they can also be paths for animals.

People should watch animals from a safe distance. Sagor catfish have sharp parts on their bodies, so they should not be touched. Learning why animals appear in unexpected places helps people respect nature and stay safe.

You can watch the original news video by Channel NewsAsia to see how the fish moved together in the canal.

https://www.youtube.com/shorts/vJoKigq29ZI