Juergen Freund / Pfeffer's flamboyant cuttlefish (Metasepia pfefferi) hunting over coral reef, Batangas, Philippines.

Alex Mustard / Denise's Pygmy Seahorse (Hippocampus denise) on a coral seafan. Misool, Raja Ampat, West Papua, Indonesia, November.

Tim Laman / Denise's Pygmy seahorse (Hippocampus denise) camouflaged in a Sea Fan. Orange colour form. Vicinity of Gam Island, Raja Ampat, Indonesia, May 2007

Alex Mustard / A mimic octopus (Thaumoctopus mimicus) makes a 'poisonous sole' impression, Java Sea, Puri Jati, Bali, Indonesia. South East Asia, Java Sea

Juergen Freund / Head-shielded slug (Philinopsis cyanea) Batangas, Philippines

Juergen Freund / Thorny seahorse (Hippocampus hystrix) Batangas, Philippines.

Juergen Freund / Fingered dragonet (Dactylopus dactylopus) walking on seabed, Batangas, Philippines.

Juergen Freund / Nudibranch (Melibe fimbriata) with extended oral hood, Batangas, Philippines

Juergen Freund / Nudibranch (Phyllodesmium rudmani) mimicing a Xenia soft coral, Batangas, Philippines.

Juergen Freund / Portrait of Stonefish (Synanceia horrida) Moluccas Islands, Indonesia.

Juergen Freund / Longarm octopus (Octopus sp) well camouflaged in the sand on seabed, North Sulawesi, Indonesia.

Juergen Freund / Creeping ctenophore / comb jelly (Coeloplana meteoris) camouflaged on seabed, North Sulawesi, Indonesia.

Juergen Freund / Two Filamented / roughsnout ghostpipefish (Solenostomus paegnius / cyanopterus) mimicing sea grass, North Sulawesi, Indonesia

Juergen Freund / Two Leaf scorpionfish (Taenianotus triacanthus) on coral reef, North Sulawesi, Indonesia.

Juergen Freund / Leopard / Panther / Peacock flounder (Bothus pantherinus) swimming over sandy seabed, Bali, Indonesia.

Juergen Freund / Whitemargin stargazer (Uranoscopus sulphureus) partly buried in the sand, Komodo NP, Indonesia.

Juergen Freund / Whitemargin stargazer (Uranoscopus sulphureus) partly buried in the sand, Komodo NP, Indonesia.

Juergen Freund / Peacock flounder (Bothus mancus) hidden in sand on seabed, West papua, Indonesia.

Juergen Freund / Pygmy seahorse (Hippocampus bargibanti) camouflaged amongst coral, Raja Ampat, West papua, Indonesia.

Juergen Freund / Mimic Octopus (Thaumoctopus mimicus) impersonating a flatfish or flounder. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Heart urchin (Echinocardium sp) of the family Loveniidae. These sea urchins are named for their shape. Lembeh Strait, North Sulawesi, Indonesia

Juergen Freund / Thorny seahorse (Hippocampus hystrix) hiding by a similarly-coloured sponge. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Spiny devilfish / Bearded ghoul fish (Inimicus didactylus) well hidden on the coral rubble. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Nudibranch (Phyllodesmium briareum) on the sea bed. This nudibranch mimics a soft coral. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Nudibranch (Glossodoris cincta). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Velvet ghost pipefish (Solenostomus sp) camouflaged against coral, Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Ambon scorpionfish (Pteroidichthys amboinensis). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Pair of Broadhead flatheads (Thysanophrys arenicola) camouflaged on the sea bed. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Ambon scorpionfish (Pteroidichthys amboinensis). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Ornate ghost pipefish (Solenostomus paradoxus) well-camouflaged amoung sea grass. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Pygmy / Stumpy spined cuttlefish (Sepia bandensis). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Allied Cowrie (Diminovula culmen) camouflaged on Soft coral host (Dendronephthya sp). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Paddle-flap scorpionfish (Rhinopias eschmeyeri). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Ambon scorpionfish (Pteroidichthys amboinensis) and similar-looking weed. This scorpionfish can change its colour for the best camouflage. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Thorny seahorse (Hippocampus histrix) on a starfish. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Fingered dragonet (Dactylopus dactylopus) camouflaged on the sand, close-up of the face. Lembeh Strait, North Sulawesi, Indonesia.

Alex Mustard / A Shortpouch Pygmy Pipehorse (Acentronura tentaculata / breviperula) showing sand-like camouflage. Bali, Indonesia, Java Sea, August.

Alex Mustard / A Halimeda Ghost Pipefish (Solenostomus halimeda) on a coral reef. Lembeh Strait, Sulawesi, Indonesia. Celebes Sea.

Juergen Freund / Sea pen porcelain crabs (Porcellanella triloba) in sea pen (Pteroides sp.). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Paddle-flap Scorpionfish (Rhinopias eschmeyeri). Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Ornate ghost pipefish (Solenostomus paradoxus) camouflaged against coral. Lembeh Strait, North Sulawesi, Indonesia.

Juergen Freund / Redfin triplefin (Ucla xenogrammus) camouflaged on coral reef, Lembeh Strait, North Sulawesi, Indonesia.

Alex Mustard / Tassled Wobbegong (Eucrossorhinus dasypogon) resting under a coral head. Raja Ampat, West Papua, Indonesia. Tropical West Pacific Ocean. March

Alex Mustard / Tassled Wobbegong (Eucrossorhinus dasypogon) resting under a coral head. Raja Ampat, West Papua, Indonesia. Tropical West Pacific Ocean. March

Alex Mustard / Tassled wobbegong (Eucrossorhinus dasypogon) resting under the ledge of a coral reef during the day, Triton Bay, West Papua, Indonesia.

Tim Laman / An unnamed Pygmy seahorse (Hippocampus) one of several pygmy seahorse species in Raja Ampat, West Papua, Indonesia, April 2007

Tim Laman / Pygmy Seahorse (Hippocampus bargibanti) in yellow colour phase camouflaged in a yellow Sea Fan. West Papua, Indonesia, April 2007

Roberto Rinaldi / White leaf scorpion fish (Taenianotus tiracanthus), Malaysia.

Roberto Rinaldi / Longnose hawkfish (Oxycirrhites typus) hiding in gorgonian seafan, Tubbataha Reef, Philippines.

Roberto Rinaldi / Tassled scoprionfish (Scorpaenopsis oxycephalus), Sulawesi, Indonesia.