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Coconut husk (fiber) very fine great with smaller animals, messy with larger animals, absorbent and holds humidity well.
Coconut chips larger pieces of coconut, soft, absorbent and hold humidity well.
Cypress much large hard pieces of cypress, pointy and sharp edges at time, hold humidity well. Cypress mulch found in your local store such as home depot are often blends of different wood.
I use coco fiber for hatchling hognose and adult sand boas as it promotes their natural behaviour.
I use coconut chips with some BP and Carpets