Pascal Kobeh / Small and green armored pipefish / Longtail ghostpipefish (Solenostomus armatus) is escorting a brown robust / seagrass ghost pipefish (Solenostomus cyanopterus), Sulu sea, Philippines

Pascal Kobeh / Robust / Seagrass ghost pipefish (Solenostomus cyanopterus) imitating an algae / a piece of seagrass, Sulu sea, Philippines

Georgette Douwma / Robust Ghost pipefish (Solenostomus cyanopterus), female carrying eggs in pouch. Lembeh Strait, North Sulawesi, Indonesia.

Pascal Kobeh / Robust / Seagrass ghost pipefish (Solenostomus cyanopterus) imitating an algae or a piece of seagrass, Sulu Sea, Philippines

Juergen Freund / Robust ghost pipefish (Solenostomus cyanopterus) two on sea floor, Kimbe Bay, West New Britain, Papua New Guinea.

Solvin Zankl / Robust ghost pipefish (Solenostomus cyanopterus) Raja Ampat, West Papua, Indonesia, Pacific Ocean

Alex Mustard / Backlit photo of a Robust ghost pipefish (Solenostomus cyanopterus) reveals a small fish that it has just eaten in its stomach. Lembeh Strait, North Sulawesi, Indonesia. Molluca Sea.

Alex Mustard / Robust ghost pipefish (Solenostomus cyanopterus) larval stage, drifting at night in open ocean as part of the plankton, North Sulawesi, Indonesia, Lembeh Strait.

Georgette Douwma / Robust ghost pipefish (Solenostomus cyanopterus) composite image showing different colour changes to match surrounding environment on black background. South East Asia, Indo-West Pacific Ocean.

Alex Mustard / Pair of Robust ghost pipefish (Solenostomus cyanopterus) moving over the seabed disguised as blades of seagrass, with female on the right, Ambon Bay, Maluku Archipelago, Indonesia, Banda Sea.

David Fleetham / Ornate ghost pipefish / Harlequin ghost pipefish (Solenostomus paradoxus) and Robust ghost pipefish (Solenostomus cyanopterus) on coral reef. Dumaguete, Philippines,