Tis a VERY OLD thread, but I've always been interested in the Sstram and Mak (and the Nahara, which the original posters seemed to have excluded). A couple of things:
KASU stands for Katherine Applegate Screws Up, and is applicable to the following: errors regarding plot such as the infamous thought speech KASU in the Invasion, saying that Seagulls have talons in Animorphs 18: the Decision, and Ax freaking out over Visser Three morphing a bird from the homeworld, despite the fact that young Andalites morph this bird during training. It wouldn't apply to a species that K.A mentioned once and never brought up again--so long as it doesn't directly drive the plot. I feel the need to point this out as I've seen KASU thrown around as an excuse a few times in various threads.
I personally dislike the idea of the Andalite homeworld getting called "Andal." It's for the same reason that I disliked this one instance in a fan fic where the Pemalite home world was called "Pema." I mean look at Earth: we aren't REALLY called Earthlings, are we? We're homo sapiens/ humans. If we're going to call these home worlds Andal, Pema, Anatia, etc. then other aliens should call our planet Sapia, or Homo Sapia. It's just a preference thing--me being an annoying door knob.
But back to the relevance: I've thought a bit about this actually. I just assumed that, if the Yeerks were able to infest the Sstram, Mak, and Nahra, then those creatures were either 1) pacifists like the Hork-Bajir, 2) too weak to defend themselves from the Yeerks (assuming they've already taken the Hork-Bajir and Taxxons, 3) already lived on the Yeerk home world and got taken like the Gedds, or 4)were just too stupid to NOT get infested. I mean, let's think about who the Yeerks have taken thus far: The Hork-Bajir were peaceful creatures, who probably saw the Yeerks as potential friends; the Taxxons bargained their freedom to the Yeerks over a supply of meat; the Gedds were their natural hosts; Visser Three plain got lucky; and the humans were pretty much tricked into getting infested. Had the Yeerks never gotten the Hork-Bajir, it's doubtful that they would have gotten to Earth. Their entire Empire, really, is just based on luck and praying on creatures just barely able to carry out basic tasks.
