With an octi and squid of similar size my personal feeling is that the squid would eat the octi. Squid appear to be far more aggressive predators than octis and are rather better armed (suckker rings etc!). It's not unsual in squid stomach contents to find they have preyed on fish considerably larger than themselves (I even found shark in one once!) .Armstrong said:I don't think anything would happen. I wouldn't say Squids are an octopuses main diet, but most likely...if the squid got in contact of the octopus, and the octopus was quick enough to catch it, the octopus would most likely eat the squid with no problem. If the octopus is very, very tiny, then I wouldn't even say anything would happen.
Iv always wondered what would happen if a Cuttlefish and a Squid were together. I read they aren't allowed to be in the same tanks together. What happens if they are?