To be correct. Fish ova (eggs) do not actually "hatch" they 'develop'. A fish egg that has developed sufficiently for it to be recognised as a fish is called a "Fry"
Baby fish are called Fry.
Newly hatched sultan fish are born with very small, soft scales. They are also much smaller than adult fish. Despite their small size, newly hatched sultan fish are able to feed themselves.
Newly hatched chicks that have not been sexed; also called "unsexed" or "as hatched."
Snakelet, neonate (a newly-born snake), hatchling (a newly-hatched snake)
Baby snakes are commonly referred to as snakelets. Newly born snakes are called neolates, while newly hatched snakes are called hatchlings. A group of snakes is called a nest
They need to have food when out of the shell. Scratch works well.
Newly hatched insects are generally called crawlers.
A Baby Fish is called a Fry, a fingerling, or a guppy.
Are your referring to what they are called? They are called fry. Some people call them guppies but that is not right. A guppy is a species of fish, not a baby fish. Young or baby fish are usually just called fry, but some sciency types will call them larvae if it is appropriate.
Newly hatched sultan fish are born with very small, soft scales. They are also much smaller than adult fish. Despite their small size, newly hatched sultan fish are able to feed themselves.
A fry
alevin
A newly born or hatched fish is a fry.
alevin
Fry [1913 Webster] Alevin
Fry. Or alevin.
jellybaby
Newly hatched chicks that have not been sexed; also called "unsexed" or "as hatched."