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its me again !!!!! What is normal pictus catifish behaviour????????????

Kinda hard to answer that unless you indicate what exactly it is you are looking for. Err, otherwise, they school, they skulk. Kinda like that.

if i get another one of the same size will they fight ????? how do u know so much????? ur so usefull

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).

god how do u know so much, who r u where do u live, do u work for an aquarist centre

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

Short answer: yes.