They probably shouldn't, if the tank is large enough . Get more than just two and they should behave a lot more normally (schooling fish are known to exhibit strange behavior sometimes when placed with just one other conspecific).
this is slightly wrong seeing as this is planet catfish, but how agressive could a rainbow shark get at 4 inches (rainbow shark is a red finned shark with all red fins and he is more brown than black). Could he ....ooooooo.... say...... Kill a guppy slowly by nipping at his fins untill he couldnt swim properly and then ambush the poor guppy in the night leaving me to find a corpse in the morning
pictus_man_77 wrote: this is slightly wrong seeing as this is planet catfish, but how agressive could a rainbow shark get at 4 inches (rainbow shark is a red finned shark with all red fins and he is more brown than black). Could he ....ooooooo.... say...... Kill a guppy slowly by nipping at his fins untill he couldnt swim properly and then ambush the poor guppy in the night leaving me to find a corpse in the morning