To get started, make your way over to Crab Island, the southernmost island found in Terminus. If you need a hand getting there, you can deploy a tactical raft at the Docks to help you traverse the Kraken-filled waters.
Once you arrive on the island, you'll notice three large rock-like masses near the island's center. On the northern side of the middle rock, look up to the top, and amongst all the foliage, you'll spot a crab pot leaning against the base of a tree.
Now, toss an explosive at the crab pot, and it'll explode, seemingly causing the crabs to escape. Now, along the base of the rock, right of the Zombie hole, you'll spot several small yellow-colored crabs popping up from the sand.
Once you've spotted the crabs, approach them and melee them while crouched. This will see you entering a mini-game, where you're given a Baseball Bat and must hit as many crabs as possible that pop up within 30 seconds.
Hitting these crabs can be tricky, as not only do they pop up and disappear very quickly, but you must ensure your small white dot reticle is aligned on them. Otherwise, you'll miss your shot.
Should you perform well, you'll receive a reward ranging from Salvage, Weapons, Essence, and more. We're currently unsure what amount you need to hit to receive a reward, but we know that 12 definitely will get you something.