Im not so sure about that after looking on you tube. This is a clear whitish bubble, it does not look like a tube coming from the fish but a bubble of some sort sourronding that area. The fish is not acting normal. it just kinda wants to stay against something and hover on the bottom like it is leaning on the bottom to stay in place. If move something at it the fish will move out of the way and then go right back to were it was. Im worried this might be serious.