As Excavtor states, it is difficult to give an accurate answer without a link or further HTML/CSS.
My guess is that you have some default padding or margin on that image.
padding: 0 5px 5px 0;
margin: 0 5px 5px 0;
Just make sure you are specific when selecting that image in your css. Ideally you should give your image a unique id.
<img id="abe-pic" src="files/gallery/bio/abe.jpg" />
You should also close your image tag off properly as highlighted above.