Fairday's Riddle: Way To Go Slow!

Hello, Riddlers! Can you guess our theme? It's fun to see them sunbathing at the pond. ~ F

The wily hare believed me beat, but my win was his defeat. Though I live in a shell, I move about slow and well. 

What am I? Stop by Friday for the answer. 

I gave you a clue! (I'm in this picture)

FEAR NOT THE UNEXPECTED