Ben Affleck acci­dently showed off his tat­too the other day while buck­ling his daugh­ter into her carseat:

Yup, its a DOLPHIN. Not gonna lie, that is kind of a LAME-O tattoo.

Sup­pos­edly, ex-fiancee Jen­nifer Lopez has one on her back of her shoul­der that matches Ben’s.