Can Pleco Fights Cause Death?

[ApolloJ]

If you unfortunately mix up two Plecos that don't like each other, and start to fight, yet you don't have anywhere else to re-house either of them for looong time, and keep the fighting up will either of them die? because i've seen some youtube videos regarding this matter, it doesn't seem anything serious, they just push each other around, btw this is all hypothetical, i'm not going through this, not is anyone I know of.

 

[snowflake311]

If they are fighting all the time then the constant stress can kill one or both of the fish. But if they only fight every now and then they should be fine. But stress kills.