Tattoo question

I have one tattoo (my own design) and I'm looking at getting another. My question is, I've heard that people get tattoos of dolphins because it's supposed to be a protector in the water (i.e. dolphins protect from sharks). But I'm not sure I want a tattoo of a dolphin or not. Are there other tattoos (related to surfing) that people get for various meanings? I would like one of my tattoos to relate to my love for surfing and the ocean. Any suggestions?