Yeaflon have an innate sense of z-space. For whatever reason, that's how their species evolved. Able to sense things in z-space which means sensing someone in morph, though that ability is just being recognized.
Because of this innate sense of z-space, their z-space capabilities are near impossible for others to use. This is since there are a lot less sensors as they would be superfluous to the Yeaflon.
If a Yeaflon ever captures an alien ship, they will first find out all they can before replacing it with their own z-space equipment.