i presume you mean an egg-cup. these can be made out of a variety of materials- from parcilein to wood. they can come in plain or novelty designs.
get the eggs out and put them in a separate tank because the fish will eat the eggs.
take the eggs out and put them in another tank with water!!!!
A dash of tobasco.
When the eggs hatch the Mantis will eat pest insects.
yes otherwise they will eat eachother
yes you can get food poisoning from eating old eggs. You should never eat eggs beyond the expiration date on the package.
sharks do not eat eggs. they will eat other sharks' eggs though
yes but sometimes the male will eat the eggs but if you dont put a male in there the eggs will still hatch but in more time.
you do not eat easter eggs
Well, If the parrot fish lays eggs you should probably seperate it because it will guard the eggs for a few days and then eat it. Put the eggs in a different tank or something.
yes,they do eat thare eggs
They won't eat frogs. They will probably nibble on the eggs, so it's unlikely you'll get baby frogs. You may want to remove the eggs and then put them back in when they hatch into tadpoles (they might still get eaten, but they'll have a fighting chance!).