Original: The blanket octopus is immune to the venom of the Portuguese Man o 'War, and they have been known to rip off its tentacles and use them for defensive purposes.
Simplified: The blanket octopus Tremoctopus is immune to the venom of the Portuguese Man o 'War. The blanket octopus has been known to rip off the Portuguese Man o' War's tentacles and use them for defensive purposes