Ptilosarcus gurneyi
32cm
8-100m
105 sites
Pennatulidae
Imagine gliding along the seafloor in the Northeast Pacific, when suddenly you spot a vibrant orange plume swaying gently in the current – that's likely an Orange Sea Pen (Ptilosarcus gurneyi)! These fascinating creatures are not plants, but colonial corals, related to sea anemones and jellyfish. Reaching up to 46cm in height, they resemble old-fashioned quill pens stuck in the sand. Divers typically encounter them in sandy or muddy habitats from relatively shallow depths to around 100 meters. While not actively moving, their bright colour and feathery appearance makes them a striking sight, adding a splash of colour to the often muted tones of the deep.
The Orange Sea Pen is easily identified by its bright orange or reddish-orange colour and feather-like shape. It consists of a thick stalk anchored in the sediment and numerous polyps branching out from the sides, giving it a soft, plume-like appearance. The size, typically around 32cm but reaching up to 46cm, is also a good indicator. Look for them standing upright in sandy or muddy areas.
