
Betta's may survive in a cup,but it's only a matter of time before illness will take over. They are like all other fish.They need taken care of,just like everyone else.Clean water,good food,swimming room,etc.You do the right things,and your betta will glow from the care.

And just one more note...Did you ever notice at the LFS's,just how many Betta's DONT survive the cup??? Although most LFS's are quick to dispose of this matter.