Growth on my Flowerhorn fin

TheQuarterMile

Feeder Fish
MFK Member
Aug 1, 2013
62
0
6
India
My flowerhorn is healthy, eats properly and there is no change in his body language.. Initially there was this mark on one of his fin which I thought was sort of a birth mark. Now over time this thing has grown and I am unable to identify what it is. Can anyone tell me what this could be and if any precautions should be taken?

uploadfromtaptalk1427862098187.jpg

uploadfromtaptalk1427862111169.jpg

uploadfromtaptalk1427862127407.jpg
 
zoomed.com
hikariusa.com
aqaimports.com
Store