Dolphin tattoos are popular. This sea mammal is smart and friendly.

Lots of zoos and sea parks have dolphin exhibitions--and temporary dolphin tattoos are best sellers in their gift shops.

These are popular for ankle and lower back tats.

here's a nice image dolphin tattoo with a wave pattern similar to japanese wood cuts.

a cute bottlenose dolphin with a grin and a full body tribal tattoo design.

and a couple flash art pics

Here is a picture of an arm tattoo of a couple of dolphins with attitude.