Assassin's Creed Odyssey: Find the necklace in the sunken temple - Shark the Vagrant

Find the necklace in the sunken temple is an objective in Assassin's Creed: Odyssey (ACOD).

Memory[edit]

Talk with the vegetable vendors found in the central section of the Cursed Valley of Pali.
They will tell the descendant to head to the Islet of Zeus where they will need to defeat Sharks to claim a sunken treasure.
Travel to the Southern region of Kephallonia, south of the Ancient Ruins of Kranioi.
Make your way to the watery ruins found in this area.
Once you are close, use Ikaros to survey the area more properly.
Among the ruins you will find the treasure chest under water.
What is likely to be reveals is there are 2 sharks circling the Ruins where the chest is.
The Shark needs to be fairly close to the surface of the water for your arrows to hit it.
Defeat the 2 sharks before diving the ruins themselves.
Swim toward the main section of the underwater ruins then dive down.
Between the Western pillars you can find the location chest.
Collect the treasure inside it to complete the location objective and this objective of the side quest.