Do you mean second to last pic is a porcelain crab? Last pic doesn’t look reef safe.No clue on the first pic, looks like some sort of eggs, probably from a snail. 3rd and 5th pics are pistol shrimp, 4th is a red mithrax crab, safe algae eater, 6th I'm not sure on exact ID but looks to be a bad crab for a reef tank, could eat fish and coral. Last pic seems to be a porcelain crab, safe filter feeder.
I agree with this however it did not flush out a couple small bobbit-like worms from the rock. Quarantine and night-time observation would be my suggestion after the high salinity flushas per their instructions if ur worried about hitch hiking pests - submerge the rock in high salinity water for a while...and all the nasties will jump out