Invade the bodies of the host species through ingestion.
At a point of critical mass ( eg, 2 billion ingested baby octopuses) they all come bursting out a'la Alien as full size adults at the same time. This would equate to around 1 octopus per family. They've got eight arms so they would be able to hold on to each family member and await further orders from the Octopus Leadership.
Maybe that's their strategy:
Make tasty babies.
Invade the bodies of the host species through ingestion.
At a point of critical mass ( eg, 2 billion ingested baby octopuses) they all come bursting out a'la Alien as full size adults at the same time. This would equate to around 1 octopus per family. They've got eight arms so they would be able to hold on to each family member and await further orders from the Octopus Leadership.
People would be up in arms!
HaHaHaHa! Very good.