Originally posted by psycho gundam
it's consistent for his power-set for a few years now, so no "harm" done there.all i'm going on is the incident: head got nicked one time and made him mad, his torso took many shots and made ricochet sounds his forehead didn't indicating hardness.
Maybe it has to do with musculature as you said.
The head has skin and bones to the forehead not muscle like the body.
Or maybe they'll retcon the clothes to be armor.
It's just the first issue.
I'm sure we'll get a detailed look at Aquaman's (and Mera's) powers.