octopuses release black ink into water
blue_lined_octopus is octopus. greater_blue_ringed_octopus is octopus. veined_octopus is not octopus. veined_octopus is octopus. blue_ringed_octopus is not octopus. glass_octopus is octopus. blue_ringed_octopus is octopus. big_blue_octopus is octopus. southern_blue_ringed_octopus is not octopus. southern_blue_ringed_octopus is octopus.