octopuses release black ink into water
glass_octopus is octopus. big_blue_octopus is octopus. blue_lined_octopus is octopus. southern_blue_ringed_octopus is octopus. amphioctopus is octopus. blue_ringed_octopus is octopus. veined_octopus is octopus. greater_blue_ringed_octopus is octopus. umbrella_octopus is octopus. blue_ringed_octopus is mollusca.