Sergio Hanquet / Scorpionfish (Scorpaena maderensis) resting cmouflaged on rock. Tenerife, Canary Islands.

Sergio Hanquet / Scorpionfish (Scorpaena maderensis) resting. Tenerife, Canary Islands.

Pascal Kobeh / Pacific spotted scorpionfish (Scorpaena mystes) camouflaged on reef of Salvatierra shipwreck. Diver exploring in background. Baja California, Mexico.

Magnus Lundgren / Wild Wonders of China / Mozambique scorpionfish (Parascorpaena mossambica) with distinctive horns. Xiaoliuqiu Island, Taiwan

Pascal Kobeh / Madeira rockfish / Scorpionfish (Scorpaena maderensis) in front of squid eggs, Canary Islands

Pascal Kobeh / Madeira rockfish / Scorpionfish (Scorpaena maderensis), Canary Islands

Pascal Kobeh / Spiny devilfish (Inimicus didactylus) on the sand which it imitates and whose has been cut by a predator, Sulu sea, Philippines

Tony Wu / Demon stinger (Inimicus didactylus) sitting on the sand with venomous spines on full display. Lembeh Strait, North Sulawesi.

John Shaw / Pacific spotted scorpionfish (Scorpaena mystes) at Puerto Ayora fish market, Santa Cruz Island, Galapagos Islands. May.

Shane Gross / Spotted scorpionfish (Scorpaena plumieri) camouflaged on a sponge, The Bahamas.

Georgette Douwma / Devilfish /Stinger (Inimicus didactylus). Lembeh Strait, North Sulawesi, Indonesia.