Feather star
A five-limbed invertebrate native to Delphi, the feather star resembles a shimmering aquatic plant, whose appendages billow out from a central point like feathery ferns when dormant, each unfurling several fronds each reaching up to thirty centimeters in length. When actively hunting, its fronds open to create an almost spherical perimeter of feathery plumes around the creature, which glimmer with attractive iridescent colors as tiny iridophores in each tendril is activated. When it encounters small organisms or tiny edible particles, tiny filaments of these feathers convey the food down the fronds, along the arms, and into the center of the star, where its mouth and digestive system are located.
It is able to drift on the currents, or move from place to place on its own, by 'standing' on any two of its arms and wiggling in the direction it wishes to go. When at rest, the feather star anchors itself to a surface with some of its legs while it allows the other to drift, allowing it to continue to passively filter-feed while dormant.
While rare, the GCEPS organization offers access to their live specimen to any interested xenozoologist or aquarist upon inquiry.