A Hydrosoar first appears as a Sub-Boss in the water-filled labyrinth of Angler's Tunnel. The front of its body is heavily armored and cannot be harmed. The only weak point on its body is their tender backside, which Link must exploit with the edge of his Sword. This is easiest done by waiting for it to pass by and striking from the side, but it is also possible for him to chase it down with the Pegasus Boots. Upon each hit, Hydrosoar will spin and change direction. It is possible for Link to equip the Roc's Feather and leap over Hydrosoar as he passes beneath Link in the longer straightaways and then strike him. Once defeated, Link will gain access to the Flippers.