Deep-Sea Octopus (Graneledone boreopacifica) Conducts the Longest-Known Egg-Brooding Period of Any Animal Robison, Bruce ; Seibel, Brad ; Drazen, Jeffrey Abstract Publication: PLoS ONE Pub Date: July 2014 DOI: 10.1371/journal.pone.0103437 Bibcode: 2014PLoSO...9j3437R