me experience with pikes has been that they are a little on the aggressive side. of corse they have all been orange pikes so i dont know if it was just that species. penut has your experience been that orange's are meaner then most or is it just mine? granted i agree they have all seemed very intelligent i can almost see him thinking. hes very curious everytime i stick my hand in to move stuff around, new tank mates, he runs up to everything new just to "check it out" it seems. like i said i love my little guy. btw what is the orange pikes scien name? xingu II right? just a guess.