Whitemargin stargazer (Uranoscopus sulphureus). This fish usually lies almost completely covered in sand, with only its upward-looking eyes visible. In this position it waits for prey, mostly smaller fish, to approach before engulfing it with a rapid strike. Some of the muscles in its head have been adapted into an electric organ capable of delivering a shock of up to 50 Volts. This is used to stun nearby fish. It also has two poisonous spines behind its head to deter predators. These can deliver a painful, if not fatal, wound to humans. It inhabits sandy reef bottoms in the tropical Indo-Pacific region, and can reach 45 centimetres in length. Photographed in the Egyptian Red Sea.