Answer:
I am a celebrity fish.
My first is in fish but no in snail. My second is in rabbit but not in tail. My third is in up but not in down. My fourth is in tiara but not in crown. My fifth is in tree you plainly see. My whole a food for you and me.
I can be repeated but rarely in the same way. I can't be changed but can be rewritten. I can be passed down but should not be forgotten.
I am an English word with 3 consecutive double letters.
I am filled with garb the price is free. Just return what you don't need.
I am always hungry, I must always be fed. The finger I lick will soon turn red. What am I?