It is possible that it is a parasite, hanging on the eye, is this gar wild caught?
but.......in order to be sure it is or isn't a parasite, a more in focus close up is needed.
I would suggest finding someone with a camera, that can be equipped with a micro lens.
A shot at least similar to this.
This above, is a Lernea parasite.
I use a generic micro lens, on my Canon Digital rebel, and it works well.
I found the lens on Craigs list (used) for about $20
A couple more shots using that lens