definitely not.
and i have found my female jag to be very tolerant and polite of fish that are bigger than her, like my bgk and pleco. i have been very surprised by her placid nature. she does not look for dominance at all. unless, of course, they can fit in her mouth...
i have two juvie texas which i am currently growing out on massivore. i plan on picking one and rehoming the other, if you want it, it is still only around 7cm though.