Just bought a used tank and this guy came with it. He's about 4.5" long excluding the tail. She said he was a sailfin pleco, but doesnt look like one to me. Seems big for a BN, especially since no bristles would indicate female. If anyone could help, I would appreciate it. I would love to have an idea about how big it's going to get so I can see if I need to rehome it or if it will be fine in the 90 gallon.