soft body part limb plume BTO:0002480 BrendaTissueOBO Organisms as Riftia pachyptila end with a deep red fan-like structure (plume) which extends into the water and which absorbs H2S and O2 for the bacteria, and also absorbs CO2 for use as synthetic raw material. An animal structure having a main shaft bearing many hairs or filamentous parts; especially: a full bushy tail.