Hangs head-down among crinoids and soft coral, usually in pairs.
To about 12 cm, though most are 6 to 8, and females are distinctly larger. Three characters identify it and none of them is colour. The caudal peduncle is long and slender, so the tail fin is clearly stalked off the body. The fin membranes are deeply incised and often tipped with small filaments. And the body, fins, head and snout carry abundant slender dermal appendages, sometimes very long, which is what gives the animal its spiky outline — the other ghost pipefish are not spiky. Colour runs from semi-transparent with red, yellow and white scribbling to solid reddish-orange to nearly black, tracking whatever crinoid or gorgonian it is sitting in, and it identifies nothing.
Solitary or paired, hanging head-down at reef edges in current among crinoids, gorgonians and black corals. The female broods: her pelvic fins are fused and expanded into a pouch, which the male’s are not, and that difference is the easiest way to sex one in a photograph. Embryos hatch fully formed at about 3 mm and the larvae are pelagic, which is why adults appear at a site for a few weeks and then are gone. Between about 4 and 35 m, from the Red Sea and East Africa to Fiji. Two widely repeated claims about this family should be treated carefully: that they pair for life and breed only once, and that a female carries around 350 eggs. Neither traces to a published study, and the genus is currently moving — a new species was described in 2026 and the authors have another in preparation.
Ratings are per location: 1 means found on most dives that look for it, 5 means a handful of records. Where enough dives have been logged the figure is calculated from them; otherwise it is an editorial estimate, and says so. We publish habitat and destination, not the dive site.