Malayan Pygmy Halfbeak (Dermogenys collettei)
Kranji Marshes, 29th June 2017

Many older resources consider various Halfbeak populations across Southeast Asia to be a single species, the Wrestling Halfbeak (Dermogenys pusilla). However, this species is now thought to be endemic to Java, while the populations found in Singapore belong to a separate species, the Malayan Pygmy Halfbeak.

Thousands of dead fishes at Pasir Ris
By Ria Tan, 28th February 2015;

Thousand of dead fishes washed up at Pasir Ris beach today. Sean Yap also shared photos of dead fishes found on the same stretch of western Pasir Ris that I surveyed.

What is causing this mass fish death? Is it harmful to humans?

There was a line of dead fishes along the area I surveyed. Some had a thinner line.

In the part of the shore outside Pasir Ris Park proper, there was a bigger build up of dead fishes. But even here, the cleaners were trying hard to clear up the fishes. I also met Dixon who was cycling in the area and went down to the shore. I asked for his help to go down the entire length of Pasir Ris Park to see how widespread the dead fishes are. Thank you Dixon!

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Source: Wild Shores of Singapore

Stripe-nosed Halfbeak (Zenarchopterus buffonis)
Sungei Buloh, 22nd July 2014

This Stripe-nosed Halfbeak was one of many casualties of a mass mortality event that killed off large numbers of several species of fishes in one of the tidal ponds at Sungei Buloh. The hot weather, combined with the neap tide, likely led to a drop in the dissolved oxygen content that most fishes could not tolerate.

Fortunately, this was an isolated incident that did not affect fishes in the other parts of the reserve, and this particular pond has since been repopulated.

A couple of fish species commonly found in Singapore’s mangroves, river estuaries, and other brackish water and nearshore marine habitats: Banded Archerfish (Toxotes jaculatrix) (L) & Stripe-nosed Halfbeak (Zenarchopterus buffonis) ® @ VivoCity

These fishes have interesting adaptations which enable them to catch their insect prey. Find out what these adaptations are at the Festival of Biodiversity 2014, happening at VivoCity until 10pm today!