It is not recommended to mix salt water fish and fresh water fish. It is required to separate the two and provide each with the proper tempered water.
Yes. It will need to be washed in fresh water then boiled several times in clean water and then left for a few days in the sun to make sure there are no bugs or things that could possible damage your fresh water environment.
Moldy cheese or an eyeball
You can raise a sea urchin in a salt-water aquarium. There are no fresh water sea urchins so you would need a salt-water aquarium to properly care for the urchin.
Nothing...they die....
As a decoration, maybe. As a living entity--NOPE.
yes. please provide tips on fresh water aquarium fish too.
The difference is the salt concentration in the water. Fresh water aquariums mimic the environment of lakes, ponds, or rivers. However, salt water aquariums have water that is salty like oceans. Fish are either freshwater or saltwater. Do not put them in the wrong water, or they will die.
they need dechlorinated fresh water, and dechlorinated salt water made with aquarium salt.
Explain what would happen if a piece of seaweed from the ocean was placed in a fresh water aquarium?
Done frequently, and easily with many species.
100 degrees or maybe in the 70 ranges
Guppies, Platties, Swordtails and Mollies. there are a few others, but you likely won't see them in the aquarium trade.