Laying eggs in groups makes them easier to keep warm and safe and increases chance of the hatchlings' survival. Birds keep eggs in nests, where it is necessary to lay eggs in groups to facilitate feeding and care-taking. Fish lay eggs in groups so that predators cannot eat all of the eggs because there are so many in one place at one time.
They are doing that to improve their percentage of surviving.
reptiles
There are many animals that lay eggs. Mammals do not. Here is a list of a few: Birds and Reptiles are the main animals known to lay eggs. The Platypus, even though it's a mammal, does infact lay eggs. Those are the main groups that I know of.
They lay eggs and heat it with covered grass
Cows do not lay eggs,Cows do not lay eggs,
scorpion does not lay eggs. it is not like the spider which lay eggs.
They lay eggs
caterpilles do not lay eggs. no thay lay white eggs
They lay eggs.
well that would depend on what type of suckerfish it is
White suckerfish was created in 1850.