[ It's not everyday you meet an incredibly charismatic half-orc. But he's not the only one with a high Charisma score. Fish is charmed, though. ]

Many of them, especially those that dwell in the sea, are more aggressive in their aquatic features, as you put it. I had a childhood friend in another surface-dwelling tribe... I'd come along on the trading boats to see him. The coloration of his tribe was very different from ours: more like a dull orange-brown, but lovely green eyes. The shape of their ear fins were different, too. A little more like a lion fish, if you've ever seen one. Then there were others that were blues... greens... sometimes with streaks of red like the shade I sport.