This toad grows her own eggs in honeycomb pits inside her back

The female Surinam toad carries her fertilized eggs embedded directly in honeycomb-like pockets within the skin of her own back, where they develop for four to five months. Rather than hatching into free-swimming tadpoles, fully formed baby toads eventually burst out of her back and swim away, skipping the usual external tadpole stage entirely.

— Wikipedia contributors, Pipa pipa — Common Surinam toad, family Pipidae