yes, but it may kill the goldfish
mollies, tetra's, plecko's mollies, tetra's, plecko's
You should not have goldfish and platies in the same tank ever.
No, they can't. Trust me, the terrapin would rip it to shred's.
Yes you can, bloodfin tetras are renowned for their hardiness and will tolerate lower temperatures as long as it doesn't go below room temperature. The biggest problem you will face is that the goldfish might gobble up the tetras, not because they are nasty or aggressive but because they are dozy and will eat anything they can fit into their mouths. you will need a well filtered tank though and a heater if you can't maintain a room temperature in the tank without one. Your blood fin tetra will need to live in a shoal of at least 6 to be happy.
no.because they are not the same and also Rio Flame Tetra bites
I can't have another tetra in my tank.
no
Rule of thumb is to not mix tropical fish and goldfish.
No, Neon Tetras and Goldfish do not belong in the same tank. Goldfish prefer cold water, while Tetras are more of a tropical fish.
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.
It's a possibility, but a goldfish and a platy should never be in the same tank as they are not compatible, and their needs are different