no
No, shrimp and goldfish should not be kept together in the same tank as goldfish may eat the shrimp.
No, cherry shrimp should not be kept with goldfish in the same tank as goldfish are known to eat shrimp.
You should not have goldfish and platies in the same tank ever.
No, these two animals cannot live together well. The turtle will often attack the crab in an effort to eat it, and it is not advisable for them to live in the same tank together.
it depends how big it will get
yes, but it may kill the goldfish
OF COURSE NOT! Hermit crabs drowned in water , they can even drown in water that's not even an inch high , so i will sugest , if u wanna keep ur hermit crab that you don't put it in that , i have a hermit crab and a gold fish and they cant be in the same tank!
Rule of thumb is to not mix tropical fish and goldfish.
No, 5 gallons is way too small for a goldfish- they need at least 10 gallons each with the minimum tank size being 30 gallons. As for the crab- depending on the species he/she may be able to fit in a 5 gallon tank by him/herself comfortably, but this is usually not the case. Your best bet would be to go with a different type of fish such as a Betta fish- unlike goldfish, they can actually thrive in small tanks.
not for long
Of course!
Yes, but your tank size needs to support it. If you mean that a regular goldfish is a long single-tail goldfish, then you need at least a 40 gallon tank just for the 2 fish due to the size potential of the common goldfish. If you mean a regular goldfish as in a round bodied fantail, or perhaps a ryukin, then you need at least a 30 gallon tank for the 2 fish.