shell

Ive had this mystery snail for about a month or so and over the time his shell has been turning white and has green streaks on it. I have some big fish with him and i dont know if its them just knocking them around. His shell is like thinner in some areas, almost transparent.

Can feeding these foods too often to a Leopard Cteonopoma cause digestion problems because of the shells? My Leopard Ctenopoma will often spit out krill shells and make a mess even when I break the krill up into bite size pieces. I can't exactly remove the shells on these freeze dried foods...

These are nematodes found on the shell of the brain Rhinoptera javanica. Help me to know the genus of parasites.