To open your own Shop, you must have the following things:

- Be on the 1st level of evolution, - Have more than 5000 of experience.

When you get this in your Fish page, above of his experience level will appear a link saying Create Shop. You just need to click at the link and your Shop will be open.

Warning: Your store will be open, just if you have any item to sell. If your store is out of stock it will be closed and you have to open it again if you want it to appear at the Fishes shops list.