white v octopus raises from sandy bottom spreading arms and mantle, swims away fast changing body shape into a long thin band, lands on a spot with algae or seaweed searching for prey with its arms

cephalopoda abdopus octopoda seabed invertebrate octopus habitat tentacle biodiversity bottom underwater camouflage variation animal sucker swim dive ocean dig hunter prey sand marine day indopacific indonesia whitev muck changable nocturnal white clever