My first is in fish but not in snail, My second is in rabbit but not in tail. My third is in up but not in down, My fourth is in ice cream but not in crown. My fifth is in tree you plainly see. A nature food for you and me. What am I?

I am fruit. 

Fish not snail

Rabbit not tail

Up not down

Ice cream not crown

Tree.

Alícia you are right. Congratulations for you

Photo from: http://thinspirationanam.blogspot.com/2009/03/nueva-actualisacion-thispo.html