Please help to ID this pleco

[jordonsmum]

I think it's a common, but i'm not sure. I inherited it with a loach (which I have no idea what kind and haven't seen him since) and a flying fox.

http://i160.photobucket.com/albums/t174/jordonsmum/100_5982.jpg

[KnaveTO]

without seeing the dorsal fin up can't quite tell what it is.