It appears that he is, in fact, a Glyptoperichthys Scrophus (Common Name: Alligator Pleco, Chocolate Pleco, Rhino Pleco). Apparently the eyes are bluish due to cataracts. This is usually caused by overdosing with powerful medications.
Oh well, you learn something new every day. Prefer what I thought i'd learned on Saturday though.
Still, Gerald is a fine speciem nonetheeless.