How many episodes of strawberry panic are there?

No, there is currently only 26 episodes ofStrawberry Panic!

If you want more storyline, the manga might have more material.

Most anime have 13 or 26 episodes because there are 13 weeks in each broadcast season in Japan. Anime that runs for the whole year will have 50-52 episodes. It doesn't matter if the manga is longer, typically the anime is shorter.