I have a pleco veriety that is darker than the common type. He also has more wiskers b his face. He also seems a little flatter than the common type. He is not supposed to get longer than four inches and was a little more expensive than a common. Does any one know what kind he is or a place that has pictures maybe? I was just curious really as to what kind of pleco he is. I was told by my local pet store (aquatic adventures) that he would clean slower but do a more complete job.