clear/whitish can be the new regrowth of his tail.
Do what you can to help him heal if it's tail biting.
Agood way to determine tail biter vs comb tail is to look at his other fins and see if they have web reduction aswell.
-duckweed- -black and white marble, anything but VT-
-javamoss- -koi marble, anything but VT)
-hatchable brine shrimp eggs-
-indian almond leaves-
-Melano Halfmoon male-
-steel blue or royal blue CT or HM female-