jellybaby
Newly hatched insects are generally called crawlers.
Hatched
Newly hatched chicks that have not been sexed; also called "unsexed" or "as hatched."
A young pigeon is called a squab
Newly hatched ducklings actually do not have feathers.
The newly-hatched babies are called goslings.
A newly born snake is called a Snakelet Neonate while a newly hatched snake is called a hatchling
Newly hatched snakes are called hatchlings. Newly born snakes are called neonates or snakelets.
A newly born jellyfish is called a "planula." After fertilization, the planula larva develops from the fertilized egg and eventually settles on a surface, where it transforms into a polyp stage. The polyp then undergoes a process called strobilation, producing juvenile jellyfish known as ephyrae, which mature into adult jellyfish.
A newly hatched cockroach is called a nymph.
Newly hatched birds usually look raw, wet, and floppy.
A Baby Fish is called a Fry, a fingerling, or a guppy.