Enter the realm of Poseidon through his temple, using the starfish from his statue in the museum. Go left and take Aphrodite's test. Then enter the water and dive where it is marked. Go across the top, down the right side, and across the bottom of the maze. The clam with the giant pearl is just above the entrance to the Hydra's cave. (Jump for it when the shell is closed, and it will open up.)
you find it in the giant clam in the water where it says dive. :)
Its in the clam in the water maze near the hydra's cave.
The scale is one of the 5 sacred items you are collecting. Also the Giant Pearl that is right outside the Hydra cave.
The pearl you need is the giant pearl. Once you use the starfish (from Poseidon's statue in the museum), you can enter the realm and swim through the underwater maze to the cave of the Hydra. Before you enter, get the pearl from just outside the cave.
You go to the left corner from the pearl and you go in.
1. Whisker from Cerberus 2. Giant Pearl 3. Hydra's Scale 4. Ring from the Minotaur 5. Rare Flower
A flower from the Garden of the Sphinx. A golden ring from the Minotaur. A scale from the Hydra. A giant pearl from the kingdom of Poseidon. A whisker from Cerberus, the guardian of the Underworld.
Look in a clam. That's where pearls are made.
under they sea at Triton's palace
The Hydra is in his underwater lair. Swim out from the beach to the underwater maze, then go right, down, and left to find the Giant Pearl and the entrance to the Hydra cave.
under water
a grain of sand gets caught in a clam then it grows with water into a pearl