Mystery egg I.D.

These eggs appeared overnight. My tanks beeen cycling about a week now. I've seen feather dusters, bristle worms,a shrimp( I think)spaghetti worms, and various other worms. Also a bristle star. Anyhow these eggs appeared overnight I've tried google and hitchikers Id but no luck. Any help welcome :) Also is the red on the bottom of the clam algae or coral of some kind. Thanks

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