Im not sure what im suppose to be looking at in the second pic, but im going to guess the white thing in the back? That is just a sponge, harmless filter feeder
Well the first one could be a Yellow Button polyp, never seen an Aptasia that bright. And the second, looks like a bleached out Kenya Tree hanging upside down. :dunno:
The first one kinda does look like an aiptasia, especially those tentacles, but the colour is a bit off, i say kill it with Aiptasia X anyway to be on the safe side.