My dad used to have these giant otocinclus, they looked just like the normal otos but about 4 inches long. They are not related at all, just look similar and were the best algae eaters I have ever seen. This maybe what you have maybe, but I have never seen these fish again and there is very little info on them.
pics would really help!
This is the sucking loach although it's not truly a Loach.
Seeing from the name, I have a very bad feeling that it's a Chinese Algae Eater, which is not a true loach.