The first is definitely not a pod. Pods are like insects of the oceans complete with exoskeletons.
In fact I've now spent a few hours on this just for the fun of argument or debate.
Here is a picture from yet another website detailing flatworms.
Melev is considered one of the most authoritative sources around. He is local to me and I've been able to visit many of his demonstrations. http://www.melevsreef.com/flatworms.html
Here is what a typical "pod" looks like.
Notice the "shell" surrounding these animals?
If you agree with me that it is a flatworm trouble could come ahead as some have a tendency to eat corals. Good news? You can get one of these to eat them,
The new pic looks to be a tiny mini brittle star offspring. It could be a hydroid taking root but I'd guess along the lines of mini star, BTW not the debated asteria star.
But I'm leaning towards brittle star.
All pics taken from "public domain". If any are yours feel honored that I used them to inform others and decided your pic quality was excellent. Thanks.