The vast majority of fish do nothing, except to produce more than the predators can eat.
it provides a home for fish trying to protect their young
If the snail(s) are still transparent then if the fish see it they will most probably eat it because its shell is not hard enough to protect it.
Young fish are called "fry".
All Cichlids and Anabantids are territorial. Fish that protect their young and the area they have chosen to rear them in are called territorial. Many other species of fish are territorial too but there are too many to list them all here.
Young fish are called fry.
Fish have fins to protect them. Some fish are also poisonous.
What does a maned wolf do to protect its young?
An abalone doesn't really care for it's young. They swim in schools until the fish are old enough to protect themselves and even then they still stick close together.
The name of a young fish is a 'fry'
They don't protect their young they have to do it by themselves
No. Fish have no delivery system for nourishing their young.
Fish do not care for their young. Some even eat them.