Pascal Kobeh / A school of Bluespotted cornetfish (Fistularia commersonii), Red Sea, Egypt.
Alex Mustard / Leafy seadragon (Phycodurus eques) male carrying eggs, swims over seagrass meadow. Wool Bay, Edithburgh, South Australia. Gulf of St Vincent.
Alex Mustard / Leafy seadragon (Phycodurus eques) demonstrates the effectiveness of its camouflage as it shelters amongst seaweeds. This individual is a male carrying eggs. Wool Bay Jetty, Edithburgh, Yorke Peninsul...
Tony Wu / Male Korean seahorse (Hippocampus haema) giving birth. Kumamoto Prefecture, Kyushu, Japan.
Alex Mustard / RF - Denise's pygmy seahorse (Hippocampus denise) looks out from its home in a sea fan (Annella sp.). Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea. Tropical West Pacific Ocean. (This image...
Alex Mustard / Portrait of a male short snouted seahorse (Hippocampus hippocampus) in sea oak seaweed (Halidrys siliquosa). Devon, England, United Kingdom. British Isles. English Channel. North East Atlantic Ocean.
Alex Mustard / Thorny seahorse (Hippocampus histrix) gripping onto a sponge. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
Alex Mustard / Two female Common seahorses (Hippocampus kuda) fighting over territory on the seabed. The brief fight was preceeded by a ritualised, synchronised parade. Bitung, North Sulawesi, Indonesia. Lembeh Stra...
Alex Mustard / Common seahorse (Hippocampus kuda) female wrapping her prehensile tail around piece of wood on the seabed. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.
Shane Gross / Portrait of a Thorny seahorse (Hippocampus histrix) near Malapascua, Philippines.
Shane Gross / Pygmy seahorse (Hippocampus bargibanti) holding on to a branch of a sea fan coral. Malapascua, Philippines.
Shane Gross / Thorny or spiny seahorse (Hippocampus histrix) portrait made off Anilao, Philippines.
Pascal Kobeh / Trumpetfish (Aulostomus chinensis) on the coral drop off, Sulu Sea, Philippines.
David Fleetham / Bargibant's pygmy seahorse (Hippocampus bargibanti) wrapped around Eye fan coral (Cnidaria sp). Philippines.
Alex Mustard / Leafy seadragon (Phycodurus eques). Wool Bay Jetty, Edithburgh, Yorke Peninsula, South Australia.
Alex Mustard / Hedgehog seahorse (Hippocampus spinosissimus) female moves over a sandy seabed. Dauin, Negros Island, Philippines. Bohol Sea, tropical west Pacific Ocean.
Franco Banfi / Trumpetfish (Aulostomus maculatus) on wreck, Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean
Nuno Sa / Long snouted seahorse (Hippocampus guttulatus) in captive breeding laboratory at University of Algarve, Portugal. June 2010. Overall winner of the Underwater Photographer of the Year competition 2015.
Alex Mustard / Portrait of a Severn's pygmy seahorse (Hippocampus severnsi) at Mioskon Island, Raja Ampat, West Papua, Indonesia. Dampier Strait. Tropical West Pacific Ocean.
Brandon Cole / Pygmy seahorse (Hippocampus bargibanti) camouflaged in sea fan, Indonesia, tropical Pacific Ocean.
Pascal Kobeh / Long-snouted seahorse (Hippocampus guttulatus) with prehensile tail twined round seagrass, Etang de Thau Lagoons, Languedoc-Roussillon, France.
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.
Franco Banfi,Franco Banfi / Ornate ghostpipefish, (Solenostomus paradoxus) Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean
Franco Banfi,Franco Banfi / Pygmy seahorse, not currently described hiding in sea fan, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean
Juergen Freund / Raja Ampat pygmy seahorse (Hippocampus sp.) Raja Ampat, West Papua, Indonesia
Alex Mustard / Ornate ghost pipefish (Solenostomus paradoxus), juvenile, hides within a crinoid, Dauin Marine Protected Area, Dumaguete, Negros, Philippines. Wildlife Photographer of the Year 2021 competititon cate...
David Fleetham / Female Ornate ghost pipefish / Harlequin ghost pipefish (Solenostomus paradoxus) with egg mass in the pouch formed by the two specialized fins below its abdomen. Philippines.
David Fleetham / Ornate ghost pipefish / Harlequin ghost pipefish (Solenostomus paradoxus) and Robust ghost pipefish (Solenostomus cyanopterus) on coral reef. Dumaguete, Philippines,
David Fleetham / Leafy sea dragon (Phycodurus eques) among seaweed, Spencer Gulf, South Australia. January.
Alex Mustard / Tiny (1cm) Pygmy seahorse (Hippocampus bargibanti) hides in the branches of its home seafan (Muricella sp.) on a coral reef. Daram Islands, Misool, Raja Ampat, West Papua, Indonesia. Ceram Sea.
Claudio Contreras / Bluespotted cornetfish (Fistularia commersonii), La Reina Islet, close to Cerralvo Island (Jacques Cousteau Island), Gulf of California Islands Protected Area, Gulf of California
Tony Wu / Bastard seahorse (Acentronura gracilissima) Kanagawa, Japan.
Tony Wu / Shiho's seahorse (Hippocampus sindonis), a species that is endemic to Northwest Pacific coastal waters of Japan and southern Korea.