Octopus pretending to be seaweed

BocasResearchStation sez, "This video shows an octopus cleverly trying to camouflage itself amongst seaweed in Bocas del Toro, Panama.
Hiding is the primary defense mechanism for these creatures, and this little guy is making use of branches of algae to try to get by unseen."

An Octopus Pretending to be Seaweed

(Thanks, BocasResearchStation!)