Obtain the Shark Anchor blueprint or recipe from the relevant source in your game
Gather the required materials listed for crafting the Shark Anchor
Use the appropriate crafting station or NPC to craft it
If it is a quest reward, complete the required quest or objective
If it is a drop, defeat the required boss, enemy, or event that can drop it
If it is a purchase item, buy it from the required vendor or shop
If it is a trade item, exchange the required currency or items with the proper NPC or system