Deep-Sea Octopus (Graneledone boreopacifica) Conducts the Longest-Known Egg-Brooding Period of Any Animal
Figure 1
The subject female brooding her eggs on a nearly vertical rock face at a depth of 1397Neptunea amianta. Near the octopus are two Lithodid crabs and a non-brooding Graneledone can be seen above and to the right of the brooder. The mantle length of the specimen, when first encountered, was 21.2 cm.