One tattoo that you may want to consider is the frog tattoo. Frog tattoos are not a main stream tattoo, but there is a popularity for the tattoo. Just like all animal tattoos, the frog tattoo symbolizes traits and attributes of the frog.
A Wave is symbolized as one of the strongest forces on earth. so strength for one. also if you read more into it, its about faith, a wave is you against mother nature, you cannot control it, you just have to put your faith into her.