When first spotted, Wunderpus was perfectly still with a single front tentacle deeply imbedded in a sandy hole. As I watched, there was a violent eruption under the sand and as the octopus moved away, a freshly amputated arm was revealed, possibly by an eel, crab, stomatopod or perhaps a "bobbit worm" all of which are capable of easily severing an octopus tentacle, and are among the hazards of being an octopus!
16 June 2014