Where do you get the starfish in mytholagy poptropica?

1. it's not actually a sea shell it's a starfish

2. go to mainstreet

3.walk to the left

4. enter the Museum of Olympus

5. find the statue of poisiden (it's all the way past the poster on a shelf on the upper right)

6. click on the starfish on the statue's face

and there you have it!