The eye of F. piscator is rather small and shorter than its distance from the nostril in the adult.

The frontal scale is longer than its distance from the end of the snout, and as long as the parietals or a little shorter.

Coloration is very variable, consisting of dark spots arranged quincuncially and often separated by a whitish network, or of black longitudinal bands on a pale ground, or of dark crossbands, with or without whitish spots.

[4] Most of the time this snake tries to raise its head as much as possible and expand its neck skin mimicking a cobra hood and intimidate the threat.

[4] F. piscator is found in Afghanistan, Bangladesh, Pakistan, Sri Lanka, India, Myanmar, Nepal, Thailand, Laos, Cambodia, Vietnam, West Malaysia, China (Zhejiang, Jiangxi, Fujian, Guangdong, Hainan, Guangxi, Yunnan), Taiwan, Australia and Indonesia (Sumatra, Java, Borneo, Celebes = Sulawesi) type locality: "East Indies".

Nota bene: A trinomial authority in parentheses indicates that the subspecies was originally described in a genus other than Fowlea.