Two spiny devilfish (Inimicus didactylus) courting. This fish inhabits the sandy seabeds of tropical Southeast Asia, generally buried in sand by day and lying in wait for prey at night. It is known to 'walk' on the seabed using pectoral fin rays as legs. It is a relative of the stonefish, and like its relative has very poisonous fin spines to deter predators. It can reach around 25 centimetres in length. Filmed in the Lembeh Strait, Sulawesi, Indonesia.