Monkeys, a new creature. They may come in different varieties:
-A monkey that hits you in meelee, stealing bananas from your inventory and then running away (you can kill it to get them back)
-A monkey with a ranged attack, throwing rocks at you.
-A monkey (spawns rarely) carrying shinies, running faster than you, so it's very hard to kill in meelee. To get that loot you have to shoot it or drop bananas on the ground and try to push the monkey towards the bananas. When the monkey gets to a banana, it stops, drops any of its loot and starts eating for 10 seconds, timeframe in which you have to get the loot, otherwise it'll take it and start running again. It may also gather loot on the island when it doesn't have loot in its hands. It may also have natural resistance to projectiles (it takes more hits to kill it) so that people have a reason to use the banana strategy.
It's Sea of Thieves after all.
