Sure looks like one. Look on the underside of your leaves and you will probably see a lot more of them. They will damage tomatoes, peppers, squash, beans and cucumbers. They are fairly easy to kill but they will keep coming back if there are a lot of them. I spray with a Permethrin and soapy water mix making sure to hit all the leaves and especially the undersides and the ground or mulch underneath the plants.
You may have more of them than you think on your tomato plants. Look for light colored specks on the leaves which is frequently and indicator of flea beetle bites. Lots of very tiny white specks can mean spider mites but they really look totally different. I have sprayed them three times this year and have gotten them under very good control and now hardly see any.
Bill
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