Poseidon's statue is in his temple outside to the far left.
Mythology island, on a statue in the museum
It is in the museum, on the face of Poseidon's statue.
From Poseidon's statue in the museum.
In the Museum of Olympus, there is one on the face of Poseidon's statue.
in the underground cavern near Poseidon's statue
The statue of Euterpe, muse of music, is in the Temple of Muses.
The starfish on mythology island is on the face of the statue of Poseidon in the place right next to the balloon when you get on the island.
The statue of Euterpe is in the Temple of Muses. She is among the first eight statues, the first on the upper right.
the hydra is in a underground cave near Poseidon's statue.
You click the darker water underneath the statue of Poseidon on the seahorse.
Yes, she is on Mythology Island, on the path to Mount Olympus. She turns Hercules into stone when he tries to pull her snake hair. (He seems happy enough as a statue, though.)
Offer the starfish from the Poseidon statue in the Museum.