If the giant squid can live on the ground, will the creature become the deadliest predator on ground?
Deadly battle between giant squid and whales:
From UnMuseum:
We know the giant squid tangles with whales from eye-witness accounts. In October 1966, two lighthouse keepers at Danger Point, South Africa, observed a baby southern right whale under attack from a giant squid. For an hour and a half the monster clung to the whale trying to drown it as the whale's mother watched helplessly. "The little whale could stay down for 10 to 12 minutes, then come up. It would just have enough time to spout - only two or three seconds - and then down again." The squid finally won and the baby whale was never seen again.
Giant Squid have been seen in battle with adult whales too. In 1965, a Soviet whaler watched a battle between a squid and a 40 ton sperm whale. In this case neither were victorious. The strangled whale was found floating in the sea with the squid's tentacles wrapped around the whale's throat. The squid's severed head was found in the whale's stomach.
Sperm whales eat squid and originally it had been thought that such battles were the result of a sperm whale taking on a squid that was just too large to be an easy meal. The incident with the Brunswick might suggest otherwise.
The Brunswick was a 15,000 ton auxiliary tanker owned by the Royal Norwegian Navy. In the 1930's it was attacked at least three times by giant squid. In each case the attack was deliberate as the squid would pull along side of the ship, pace it, then suddenly turn, run into the ship and wrap it's tentacles around the hull. The encounters were fatal for the squid. Since the animal was unable to get a good grip on the ship's steel surface, the animals slid off and fell into the ship's propellers.
Perhaps, for some unknown reason, the Brunswick looked like a whale to the squids. This might suggest that the sperm whale is not always the aggressor in the battles. In fact, though many sperm whales have been captured, few of their stomachs seemed to contain parts of giant squids (though smaller squids seem to provide a large portion of the sperm whale's diet)
