Yes, as long as you take proper care of them :)
No, they cannot survive in a normal, rectangular fish tank because they will get sucked into the filters. Jellyfish Art produces and sell special tanks that prevent this from happening.
You can buy a tank specially designed for jellyfish at Jellyfish Art. They sell and ship tanks and jellyfish anywhere in the US.
I have never heard of a freashwater starfish, nor a saltwater goldfish, and neither will be happy in the other's water, so no, they cannot live together. If you like starfish, you could get a little saltwater tank for one or two.
Never it is way too small for a starfish a 50 gal tank is good tho
Cause there is algae that grows on the side of the tank, and that's what the starfish eat.
Stars usually eat clams, oysters, or dead fish or dead crustaceans. They have also been known to live on algae.We have had a spiny starfish and a common starfish in a tank for months, they love mussels, put them in live and whole and the starfish will open them and feed. The mussels we get from the shore. We also feed them frozen Atlantic prawns from the supermarket
Tropical usually refers to Freshwater tropicals; and so the answer is no, because all starfish are saltwater.
yes
Yes; jellyfishes live in freshwater, like some Limnomedusae.
maybe
no
White spots on a starfish usually indicate illness. If the salinity in your tank has changed, it can cause the starfish to become ill and may even be fatal.