Osedax rubiplumus is a species of bathypelagic Polychaetes that is reported to sustain itself on the bones of dead whales.

Their paedomorphic males are 0.4–1.1 millimetres (0.016–0.043 in), and have an incompleted prototroch with a posterior hooked chaeta.

The species have 16 hooks with 6-8 capitium teeth, which have handles that are 18–23 micrometres (0.00071–0.00091 in).

They also have a trunk which is 3.8 centimetres (1.5 in) in length and 2 millimetres (0.079 in) wide with the crown plumes which are 2.1 centimetres (0.83 in) in length.

[2] The species is found in East North Pacific where it is abundant.