User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-1758220-20130214034237/@comment-5043481-20130223160451

To correct the AWC who said that the sucker scars are down to collosal squid, giant squids do leave sucker scars as well. A giant squid has rings of keritin (like your fingernails) with little teeth on them on it's suckers. These leave ring shaped scars. Collosal squid have three hooks instead, which can rotate fully. These do not leave ring shapes. They leave shapes like the skin has been cut with a group of 3 spikes.

Go to a fish shop and look at a small squid - they have these sucker rings as well.