Alex Mustard / Close up of tiny (10mm) Pygmy seahorse (Hippocampus bargibanti) living disguised in Muricella sp. sea fan. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Portrait of a Yellow seahorse (Hippocampus guttulatus), Capo Galera, Alghero, Sardinia, Italy, Mediterranean Sea.

Alex Mustard / Tiny (10mm) pygmy seahorse (Hippocampus bargibanti) sheltering in seafan (Muricella sp.) Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Tim Laman / Denise's Pygmy seahorse (Hippocampus denise) camouflaging itself in a Sea Fan. Yellow colour form.~Pisang Islands, West of Fak Fak Peninsula. West Papua, Indonesia, April 2007

Juergen Freund / Denise's pygmy seahorse (Hippocampus denise) in its fan coral. Misool, Raja Ampat, West Papua, Indonesia,

Alex Mustard / 2020VISION / Yellow / spiny seahorse (Hippocampus guttulatus) female sheltering is meadow of common Eelgrass (Zostera marina) Studland Bay, Dorset, UK, August. Did you know? The two species of seahorse found in Br...

Juergen Freund / Yellow seahorse {Hippocampus guttulatus} portrait, Mediterranean Sea

Alex Mustard / A female Spiny Seahorse (Hippocampus guttulatus) in weeds. Sardina, Gran Canaria, Canary Islands, East Atlantic Ocean, October.

Juergen Freund / Pygmy seahorse (Hippocampus bargibanti) camouflaged in a fancoral. Misool, Raja Ampat, West Papua, Indonesia

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) swimming in open water above its home seafan. Pygmy seahorses are small, most less than 15mm in total length. Lembeh Strait, Sulawesi, Indonesia, Celebes Sea,...

Alex Mustard / A male Lined / Northern Seahorse (Hippocampus erectus) beside some coral polyps at night. West Palm Beach, Florida, USA, March.

Alex Mustard / Two Denise's Pygmy Seahorses (Hippocampus denise) on a seafan (Muricella sp.). Digital composite. Misool, Raja Ampat, West Papua, Indonesia, November.

Alex Mustard / Female short snouted seahorse (Hippocampus hippocampus) backlit. Capo Coda Cavallo, Olbia, Sardinia, Italy. Mediterranean Sea.

Alex Mustard / Tiny (10mm) pygmy seahorse (Hippocampus denise) sheltering in seafan. This is an unusual colour type of denise pygmy seahorse and is probably male. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Mo...

Constantinos Petrinos / Thorny seahorse hunting invisible prey {Hippocampus histrix} Sulawesi Indonesia

Alex Mustard / Large / Pot Bellied Seahorse (Hippocampus abdominalis) face portrait. Blairgowrie Marina, Mornington Peninsular, Victoria, Australia, March.

Constantinos Petrinos / Spotted or Yellow seahorse {Hippocampus kuda} Sulawesi Indonesia. Colour variation sequence

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) camouflaged in red Seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in length. Tulamben, Bali, Indonesia, October.

Constantinos Petrinos / Spotted or Yellow seahorse {Hippocampus kuda} Sulawesi Indonesia. Colour variation sequence

Juergen Freund / Dried seahorses from catch for Chinese market. Bohol, Philippines.

Alex Mustard / Female Denise's pygmy seahorse (Hippocampus denise) on coral seafan (Annella mollis) Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea.

Juergen Freund / Seahorses caught in trawler fish catch on boat. Sulu-sulawesi seas, Indo-pacific

Jane Burton / Golden seahorse {Hippocampus kuda} portraits. Captive. UK.

Tim Laman / An unnamed species of Pygmy Seahorse (Hippocampus sp.) Vicinity of Gam Island, West Papua, Indonesia, May 2007

Alex Mustard / A male Weedy Seadragon (Phyllopteryx taeniolatus) carrying eggs along tail swims through a Kelp (Macrocystis pyrifera) forest in Tasmania, Australia. Tasmania is the only part of Australia with giant...

Juergen Freund / Denise's pygmy seahorse (Hippocampus denise) in its fan coral. Misool, Raja Ampat, West Papua, Indonesia.

Alex Mustard / A pregnant male Common / Spotted Seahorse (Hippocampus kuda) next to an orange sponge. Tulamben, Bali, Indonesia, Java Sea, September.

Juergen Freund / Pygmy seahorse (Hippocampus bargibanti) camouflaged in a fancoral. Misool, Raja Ampat, West Papua, Indonesia.

Alex Mustard / A Large / Pot Bellied Seahorse (Hippocampus abdominalis) attached to ropes. Manly, Sydney, New South Wales, Australia, March.

Jane Burton / Spotted seahorse {Hippocampus kuda} light colour phase, captive, from Indo-Pacific

Alex Mustard / A Large / Pot Bellied Seahorse (Hippocampus abdominalis) hiding in sponges. Manly, New South Wales, Australia, November.

Juergen Freund / Pygmy seahorse (Hippocampus denise) on a red sea whip - not its usual fan coral habitat, in which it is much better camouflaged. Misool, Raja Ampat, West Papua, Indonesia,

Alex Mustard / A male Large / Pot Bellied Seahorse (Hippocampus abdominalis) with its tail coiled around rope. Manly, Sydney, New South Wales, Australia, March.

Juergen Freund / Pygmy seahorse (Hippocampus denise) camouflaged amongst coral. Indo-pacific

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

Roberto Rinaldi / Potbelly seahorse (Hippocampus bleekeri), one of the largest species of seahorses, Tasmania, Australia

Alex Mustard / A Deep-Snouted / Broadnosed Pipefish (Syngnathus typhle) head in profile. The flattened body shape of this species resembles a blade of seagrass aiding its camouflage. Swanage Bay, Dorset, England, UK...

Alex Mustard / A diver comes face to face with a Weedy Seadragon (Phyllopteryx taeniolatus). Waterfall Bay, Eagle Hawk Neck, Tasmania, Australia, March.

Juergen Freund / Spotted seahorse {Hippocampus kuda}, Indo-Pacific

Alex Mustard / A Leafy Seadragon (Phycodurus eques) photographed against open water. Wool Bay Jetty, Edithburgh, Yorke Peninsular, South Australia, December.

Dan Burton / Spiny / Yellow Seahorse (Hippocampus guttulatus). Studland Bay, Dorset, UK, September.

Alex Mustard / The smaller male ornate Ghost Pipefish (Solenostomus paradoxus) turns belly to belly with the larger female ghost pipefish and fertilises the eggs in her brood pouch. Unlike many seahorses, pipefish a...

Dan Burton / Maned seahorse

Juergen Freund / Seahorse (Hippicampus kuda) pair on sea rubble, West Papua, Indonesia.

Dan Burton / Neil Garrick-Maidment from the Seahorse Trust tagging a Spiny / Yellow Seahorse (Hippocampus guttulatus). Studland Bay, Dorset, UK, September 2011.

Alex Mustard / Thorny seahorse (Hippocampus hystrix) female swimming past a crinoid, Bima Bay, Sumbawa, Indonesia, Flores Sea.

MYN / Paul Marcellini / Lined / Northern seahorse (Hippocampus erectus) Biscayne National Park, Florida, USA, January. meetyourneighbours.net project

Juergen Freund / Pygmy seahorse (Hippocampus bargibanti) camouflaged on coral (Muricela sp). Lembeh Strait, North Sulawesi, Indonesia.

Roberto Rinaldi / Weedy seadragon (Phylloperyx taeniolatus) close up of head, Australia

Juergen Freund / Pygmy seahorse (Hippocampus bargibanti) camouflaged in a fan coral. Misool, Raja Ampat, West Papua, Indonesia.

Roberto Rinaldi / Weedy seadragon (Phylloperyx taeniolatus) close up of male's tail carrying eggs, Australia

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

Claudio Contreras / Project Seahorse foundation staff weighing discarded plastic fishing nets collected and ready to be shipped out for recycling into carpet material, Jao Island, Danajon Bank, Central Visayas, Philippin...

Franco Banfi / Three pygmy seahorses (Hippocampus satomiae) described at the end of 2008, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

Alex Mustard / Pair of Pontoh's pygmy seahorses (Hippocampus pontohi) courting. This pair were dancing around each other with synchronised movements. This species was first described in 2008. Lembeh Strait, North Su...

Alex Mustard / A male Thorny Seahorse (Hippocampus histrix) on the seabed next to some hydroids. Tulamben, Bali, Indonesia, Java Sea, August.

Pascal Kobeh / Pacific seahorse (Hippocampus ingens) Galapagos. Pacific Ocean.

Alex Mustard / A digital composite of a Pygmy Seahorse (Hippocampus bargibanti) swimming over a seafan (Muricella sp.). Pygmy seahorses are small, most less than 15mm in total length. Lembeh Strait, Sulawesi, Indone...

Pascal Kobeh / Thorny seahorse (Hippocampus histrix) hanging by its prehensile tail to a sponge. Philippines, Sulu Sea.

Alex Mustard / Portrait of a Common / Short Snouted Seahorse (Hippocampus hippocampus) in seagrass. Isola La Maddelena, Sardinia, Italy, Mediterranean Sea, August.

Juergen Freund / Weedy seadragon (phyllopteryx taeniolatus) swimming amongst seaweed, Albany, Western Australia

Alex Mustard / A female Spiny Seahorse (Hippocampus guttulatus). Sardina, Gran Canaria, Canary Islands, Spain, October.

Jane Burton / Spotted seahorse {Hippocampus kuda} light colour phase, note eyes rotating independantly from each other, captive, from Indo-Pacific

Alex Mustard / Pygmy Seahore (Hippocampus bargibanti) in red seafan. Pygmy seahorses are small, most less than 15mm in total length. Lembeh Strait, Sulawesi, Indonesia, June.

Alex Mustard / A portrait of a Leafy Seadragon (Phycodurus eques). Wool Bay Jetty, Edithburgh, Yorke Peninsular, South Australia, November.

Alex Mustard / A Golden / White's Seahorse (Hippocampus whitei) camouflaged on a rope net. Manly, Sydney, New South Wales, Australia, March.

Alex Mustard / A Weedy Seadragon (Phyllopteryx taeniolatus) amongst Giant Kelp (Macrocystis pyrifera). Fortescue Bay, Tasmania, Australia, March.

Alex Mustard / A female Thorny Seahorse (Hippocampus histrix). Tulamben, Bali, Indonesia, Java Sea, September.

Alex Mustard / White's / Golden Seahorse (Hippocampus whitei) framed by marine plants. Chowder Bay, Sydney Harbour, New South Wales, Australia, February.

Alex Mustard / A Large / Pot Bellied Seahorse (Hippocampus abdominalis) perched in nets. Manly, Sydney, New South Wales, Australia, March.

Roberto Rinaldi / Longsnout seahorse (Hippocampus reidi) attached to purple coral, Turneffe Reef, Belize.

Alex Mustard / A male Leafy Seadragon (Phycodurus eques) carries a new batch of eggs on his tail. Wool Bay Jetty, Edithburgh, Yorke Peninsula, South Australia, November.

Juergen Freund / Pygmy seahorse {Hippocampus bargibanti} in fan coral, Papua New Guinea

Alex Mustard / A parasitic isopod attached to a Leafy Seadragon (Phycodurus eques). This species of isopod has an ornately shaped carapace to disguise it on the seadragon. Wool Bay Jetty, Edithburgh, Yorke Peninsula...

GEORGETTE DOUWMA / Golden seahorse, Sydney, Australia

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) in red seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in total length. Tulamben, Bali, Indonesia, Java Sea, August.

Juergen Freund / Pregnant pygmy seahorse camouflaged on fan coral {Hippocampus bargibanti} Indo Pacific

Alex Mustard / A Pygmy Seahorse (Hippocampus bargibanti) camouflaged in red Seafan (Muricella sp.). Pygmy Seahorses are small, most less than 15mm in length. Tulamben, Bali, Indonesia, October.

Alex Mustard / In-camera motion blur image of a female Hedgehog Seahorse (Hippocampus spinosissimus). Lembeh Strait, Sulawesi, Indonesia, Molluca Sea, March.

Juergen Freund / Denise's pygmy seahorse (Hippocampus denise) in its fan coral. Misool, Raja Ampat, West Papua, Indonesia

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

Alex Mustard / 2020VISION / A captive Yellow / Spiny seahorse (Hippocampus guttulatus) attached to plastic seagrass, Weymouth Sealife Centre, Dorset, England, UK.

Franco Banfi,Franco Banfi / Pygmy seahorse, not currently described hiding in sea fan, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean