It would dehydrate and most likely die.
Saltwater eggs are given the name for a reason. They will live only in saltwater and will die right after you put them in fresh water.
Wade O. Watanabe has written: 'Experimental rearing of Nile tilapia fry (Oreochromis niloticus) for saltwater culture' -- subject(s): Cichlids, Tilapia, Fish-culture
It is gonna sink as the non woody plant cannot float.It is also gonna spoil as it is placed in saltwater.
Osmosis
If a saltwater plant were placed in a freshwater aquarium, it would likely not survive due to the differences in salinity levels. Saltwater plants are adapted to living in environments with higher salt concentrations, and placing them in freshwater would disrupt their osmotic balance and lead to dehydration and eventual death.
Saltwater kills most plants.
Copper will act as an oxidizing agent. Chromium will be oxidized.
it dies
Water will leave the egg
Tilapia are freshwater and are raised commercially in ponds.
nothing will happen it will be like clean water
Obviously, since they are fish they will swim but Guppies (Lebistes reticularis) are freshwater fish and will die shortly after being placed in saltwater.