Hollow-cheeked Stonefish
About the Hollow-cheeked Stonefish in Singapore
Last updated 31 May 2026
As its name suggests, the Hollow-cheeked Stonefish (Synanceia horrida) looks exactly like a stone – bumpy, greyish-brown, and often found completely motionless. This helps it to camouflage perfectly against the rocky or sandy substrate of the intertidal zone where it spends most of its life.
Identifying features
Check out some of the identifying features of the Hollow-cheeked Stonefish below.
Hollow-cheeked Stonefish have small, closely set eyes with a bony ridge in between and a prominent depression under each eye. They also have a large mouth that curves downwards. Hollow-cheeked Stonefish are sometimes encrusted with algae or other organisms, lending to their stony disguise.
Habitat and ecology
Commonly found – well-camouflaged – in the sediment near artificial seawalls, rocks or coral reefs/rubble.
Did you know?
Stonefish are ambush predators, snapping up unsuspecting fish that swim too close. They are also dangerous to humans: Used in self-defense, their dorsal spines can inject a powerful neurotoxin that causes excruciating pain. While rarely fatal, a sting can be extremely serious, so always watch your step!
Keep yourself safe
Wear covered footwear and tread carefully when exploring the intertidal area. Shuffle your feet through or avoid stepping into murky water.
Learn more about the Hollow-cheeked Stonefish!
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