
Floating Pose
This Octopus was seen during a night dive, on a sandy bottom. It was posing and swaying its tentacles to make it looks like floating 'algae'.
Am not definitely sure this is an Algae Octopus - Abdopus aculeatus, I posted it to a Marine ID Forum, and was told it is likely an Algae Octopus.

''Abdopus aculeatus'' is a small octopus species in the order Octopoda. ''A. aculeatus'' has the common name of algae octopus due to its typical resting camouflage, which resembles a gastropod shell overgrown with algae. It is small in size with a mantle around the size of a small orange and legs 25 cm in length, and is adept at mimicking its surroundings.
Aculeatus has been described as "the only land octopus", because it lives on beaches, walking from one tidal pool to the next as.. more