Any Idea

I noticed in my tank a few minutes ago some weird looking createres they are the size or a little bigger than copods, but you can see right through them.

 

Flatworms, try to siphon them out when you see them. They can suffocate corals if their numbers get too big and crash your tank if the die off in large numbers.

 

both have been removed

Not sure if seahorse will eat them or they will cause a problem for the seahorses.

 

I doubt the seahorses will eat them, don't know about causing the ponies problems. They can become unsightly as they multiply and cover the glass so you can not see your ponies.

 

Put your horses in a separate tank for a day or so, and treat your main tank with Flatworm Exit. It works like a champ.

 

The white/clear ones aren't that big of a deal. Only treat a tank if you have the red planaria ones that are out of hand and smothering your corals.

 

The are called Acoel Flatworms, they are harmless by themelves but dangerous in large numbers. Heres a link about them =]

Too Many Acoel Flatworms? - Michigan Reefers