They are fish tanks that have ocean water in them. The ocean water is almost always synthetic but can be real.
People keep salt water fish, corals and many other things in these types of tanks.
No
They swim and are popular in salt water aquariums.
In the seas and oceans where the water has a significant salt content. Also in salt water aquariums.
There is no difference in the physical aquarium itself, only what you put in it. If you go to a pet store and buy a glass or acrylic aquarium, you can use it for salt or freshwater. You may use some different equipment in it based on whether it is fresh or saltwater. For instance protein skimmers are generally used on saltwater tanks only, you use different lighting for freshwater planted aquariums versus salt water coral reef aquariums, etc. Of course the fish or invertebrates are specific to the type of water you are using as well. YOu may see some aquariums advertised as reef or saltwater, but this is just because they are a kit that comes with lighting, filtration, etc. that is suitable for saltwater.
Seahorses are salt water and frogs are fresh water, there are special aquariums for salt water fish type creatures.
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.
yes if it is big enough and if the water is salt water
No, there are special live plants grown just for fresh water or salt water fish aquariums. There are also plastic fake plants that are made for all aquariums.
The lion fish
No, it's a salt-water fish. There might be a fresh-water flounder (although I've never heard of one), but the flounder that is eaten, seen in aquariums, and generally known is a salt water fish.
Iodized salt is not recommended for saltwater aquariums because it contains additives that may harm the marine life. It is better to use marine salt mix specifically designed for aquariums to ensure the health and well-being of your fish and other aquatic creatures.
Yes they are Marine fish and do require a water containing salt with all the trace mineral mixtures of real ocean water. Make sure to use only a aquarium "Salt Mix" formulated for saltwater aquariums.