The longspine waspfish is a common benthic carnivorous fish inhabiting reefs, seagrass and sandy areas in Singapore’s coastal waters (Lim & Low, 1998: 81). It is widespread in the Indo-west Pacific, ranging from India eastwards to Indonesia and the Philippines, and northwards to Taiwan and southern China (Allen & Erdmann, 2012: 247). Its colour pattern provides good camouflage, and this fish can be difficult to discern from its surroundings. While it is known to be venomous, very little appears to be known of the toxicity of the venom in this fish’s dorsal spines. In Hong Kong, stings from this species are said to have resulted in hospitalizations (Sadovy & Cornish, 2000: 63 as Paracentropogon longispinus), but no details are provided on the severity. From the present observation, it seems that the toxicity of the venom is relatively low and does not appear to be life-threatening to a healthy human.