Trying to ID several things I have found, any help would be appreciated.

[PeTong]

I have a 120L saltwater tank running at 25C, the only real rocks are in the sump and I had a look at them today and saw critters!

I'm curious as to what they are so if anyone could help me ID them and let me know if I need to get rid of any of them, it would be appreciated

I've attached a few pictures to the bottom.

Things that I have found in the sump pictures: https://imgur.com/a/50hB5

Raw sump pictures, incase I missed anything fun! : https://imgur.com/a/HiYTz

Any information is very much appreciated!

 

[PeTong]

Imgur isn't playing ball so here's a third album with the rest of the pictures: https://imgur.com/a/5iPUv

 

[Cliving1]

1 britstle worm, 2 mushroom, 5 urchin. Pics are not great. Just guesses here

 

[PeTong]

1 britstle worm, 2 mushroom, 5 urchin. Pics are not great. Just guesses here

Thanks! And yeah, it's hard to get good pictures inside the sump, only found the worm when I was looking at the pictures and noticed a repeating pattern near the rock!

Number 4 apparently looks like Aiptasia

 

[easternreefer]

agree on 4 being aiptasia. no clue on 3. the thers I agree with as well

 

[PeTong]

Thanks, one person was worried the worm was a bobbit but most people seem to be saying bristle so I'm happy with that!

 

[homer1475]

A better picture would help, but I really don't think thats a bristle worm. It doesn't have the typical red/purple pattern a bristle has(looks more brown/black like a bobbit). I would try to get a better pic for a better ID.

If it is a bristle it's fine and a great part of your CUC. If its a bobbit......