Halimeda Ghost Pipefish

Photo: evolution_dive_resort · CC BY-NC

Halimeda ghost pipefish are near-perfect mimics of the segmented green algae Halimeda that carpets the Eel Garden slope, their angular bodies and coloration rendering them invisible to casual observation. Unlike their seahorse relatives, female ghost pipefish carry the eggs in their modified pelvic fins rather than in a male pouch — a reproductive reversal that makes Madang's populations particularly valuable for behavioral research into alternative parental investment strategies.