Zoos are becoming facsimiles - or perhaps caricatures - of how animals once were in their natural habitat. If the right policies toward nature were pursued, we would need no zoos at all.
Another defence is to make a fast escape. Octopuses can eject a thick, blackish ink in a large cloud to distract the predator while the octopus uses a siphon jet propulsion system to quickly swim away headfirst, with arms trailing behind.
