What are these?

tgditz

Reefing newb
I know the first pic is of fecal matter, but WHAT leaves it? Has been in tank since setup with rock, and have not seen anything that can leave that big of a mess?? LOL. Second is like a 2 chambered heart attached to christmas tree worm, just curious. 100_4625.webp

100_4626.webp
 
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