User blog comment:PerhapsTheOtherOne/Speculative Spitballing: Goliath/@comment-25555436-20150608190144/@comment-7622429-20150608195400

Yeah, accidentally forgot to log in when I went on another computer. Also, the 2014 version WAS immune to conventional fire everywhere except the gill areas, and most other iterations are completely immune to conventional fire as well, not possessing the gill weakness of Legendary's version.

Only by focusing fire on those areas did the naval fleet and bridge-stationed army manage to even cause him to flinch, and even then did no real damage. Also, he took a multi-kiloton nuke at point blank range, and wasn't even hurt by it. And in the prequel comic, he was only 12 meters away from the impact of the multi-kilometer meteor that caused the end of the Permian Era, and he was unscathed.