wow, so much disagrees, the whole plot is ok though if you think today, if you capture a octopus on board a yacht, it'll crawl out of the container it is in and back into the ocean. Some octopuses can crawl onto the land, in "the future is wild" they showed, an octopus, i couldnt recognize the species, it was crawling onto the sand, and hunting young turtles, this suggests in millions of years this is possible, but i havent seen any squid be able to do the same, simply the shape of the body makes it hard, right? to move on land the body structure would have to change significantly, andthe tentacles have to be much stronger, to support its own body weight like seen on "TFiW" the animals look as if they have no trouble going about on land, there is a reason why there are no giant invertebrates today...they can not suppor tthe weight, if the squids that venture to land are like the size of larger arachnids, it'll make more sense. But in 100myh episode, they showed the special veins surrounding the creature's "lungs" help it breathe...is it really possible?
Other animals have made transitions from sea to land, but it takes time, they have to go through tiem periods where they need to continually go back into the water to replinish oxygen. Then again thats why there was the swampus, but they said the swampus was a descendent of octopus, and the terasquids, from squid, it'll obviously take more time for the squids to adapt on land then octopuses, so its mroe likely for the squibbon and megasquid to be descendents of octopus...the megasquid, the legs are so synchronizerd, it must be from loads of practice, if this animal trips and falls, wouldnt it die? and the slickribbon tht takes over tis body, doesnt anyone think the megasquid is gonna die, from being controlled?