Andaman sea, Satun, Thailand. A lionfish (Pterois miles), an ambush predatory fish, hovers above colonies of sea fan (Melithaea sp.) at an artificial reef site near Pakbara, Satun province, Thailand. A large number of lionfishes as well as groupers and snappers were observed in this area during the recent expedition, suggesting a productive ecosystem, which can support a large number of marine predators.