Picture 1 not sure about the coral but yes that is a bristle worm.
Picture 2 circle 2 is green star polyps
Picture 3 trumpet coral or maybe a non expanded candy coral
Picture 4 something from the Anthelia sp maybe?
Picture 5 is frogspawn a close relative to hammer. Yes the head is punctured just keep an eye on it. It will either start to rot away or heal up
Picture 6 looks to be something from the toad stool family and the grass once again appears to be green star polyps.
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Tim
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