Apistogramma cacatuoides and a honey gouramia. depends on the exact species.
b. I would tend to say no.
Also some dither fishApistogramma cacatuoides and a honey gourami
Neither species is strictly oriented to bottom (Apistos) or surface (gourami), but both can be quite territorial. I'd leave it and decide for one or the other, but not both.Apistogramma cacatuoides and a honey gourami