I've had my current Pleco for about a month and I just started to notice
that both front fins on my Pleco have started to form some soft of
"bubbles" at the front. Both front fins look the same and the fish
seems fine otherwise.

Here are some pictures with red arrows pointing to the "bubbles".

http://www.rbartick.com/cf/pleco_1.jpg
http://www.rbartick.com/cf/pleco_2.jpg
http://www.rbartick.com/cf/pleco_3.jpg
http://www.rbartick.com/cf/pleco_4.jpg

Has anyone seen anything like this before?