Juergen Freund / Thorny seahorse (Hippocampus hystrix) well hidden amongst seagrass. Lembeh Strait, Sulawesi, Indonesia

Sue Daly / Thorny seahorse (Hippocampus histrix) Lembeh Straits, Sulawesi, Indonesia

Carine Schrurs / Thorny seahorse {Hippocampus histrix} Anilao, Batangas, Philippines

Fred Bavendam / Thorny Seahorse (Hippocampus histrix), Ambon, Indonesia

Chris Newbert / Thorny Seahorse (Hippocampus histrix) and Feather Duster Worm (Sabellastarte indica), Indonesia

Chris Newbert / Thorny Seahorse (Hippocampus histrix), Indonesia

Chris Newbert / Thorny Seahorse (Hippocampus histrix), Indonesia

GEORGETTE DOUWMA / Thorny seahorse (Hippocampus histrix) amongst corals, Andaman Sea, Thailand

Jeff Rotman / Spiny Sea Horse (Hippocampus histrix) swimming at night. West Australia, Indian Ocean.

Doug Perrine / Thorny / Spiny seahorse {Hippocampus histrix} Malaysia

Fred Bavendam / Thorny Seahorse (Hippocampus histrix) male whose brood pouch is swollen with developing eggs, Lembeh Strait, Indonesia

Fred Bavendam / Thorny Seahorse (Hippocampus histrix) clinging to branch of a sponge, Lembeh Strait, Indonesia