*snort* the animorphs conveniently forgetting that they attacked first.
I don't think this Gafinilan likes Visser 3. When he got attacked by a random hawk, he assumed the Andalite he saw was Visser 3. They are not friends. And unless Gafinilan is one hell of a liar...he doesn't know what Visser 3 looks like.
But it's possible he has been keeping tabs on the "Andalite bandits" and knew plenty about them before he saw Marco demorph.
Which we're now worried about all of a sudden, as though Cassie didn't morph right there on the stairs of the Yeerk pool back in book 1.












