Unknown plant/algae/??? Help ID

[Giraffe0621]

Have seen a few of these show up on my TBS live rock this week (though I'm not 100% sure I just didn't see them before).

No idea what they are, but want to make sure they're not something to worry about or remove. Talking about the plant/fern-like things, to the right of the red sponge in the first photo, and at "3:00" sticking straight out horizontally from the rock in the second photo.

Thanks!

 

[KJ]

Hydroids.

 

[Giraffe0621]

Hydroids.

No good. Scrub with a toothbrush to remove? Any better removal techniques? Thanks for the quick answer KJ!

 

[Mikedawg]

Yep, hydroids. Some reefers use Aiptaisa X on them

 

[tripdad]

I've had something similar to them, they starved out over the first couple of months after set up.

 

[Giraffe0621]

I've had something similar to them, they starved out over the first couple of months after set up.

I think I want to take a more proactive approach & try to get rid of them now, rather than hope they play nice & don't take over the tank. Glad they starved for you though

 

[KJ]

http://www.wetwebmedia.com/hyzoidf3.htm

 

[Giraffe0621]

Manually removed the few I saw with tweezers as I will have to pick up AiptasiaX tomorrow. While moving the rocks around I found this guy. Maybe 1" when fully extended, bright yellow. What is it?

Sorry you guys just finished ID'ing my last unknown & here's another one already [emoji849]

 

[cracker]

It's cool looking whatever it is . Is it still alive? All kinds of interesting life with TBS . Good & bad !

 

[Giraffe0621]

It's cool looking whatever it is . Is it still alive? All kinds of interesting life with TBS . Good & bad !

Yup, still alive and moving, just chilling in tupperware for now. I was guessing he's a "not good" kind of cool, but unsure what to do with him yet... thoughts?

 

[cracker]

I'm thinking a type of bristle worm. I understand they are beneficial .

 

[Mikedawg]

Manually removed the few I saw with tweezers as I will have to pick up AiptasiaX tomorrow. While moving the rocks around I found this guy. Maybe 1" when fully extended, bright yellow. What is it?

Sorry you guys just finished ID'ing my last unknown & here's another one already [emoji849]

I've never seen a bristle worm this color and I have many; good detritivores and add needed diversity IMHO. Might study his head structure and search for eunicid worm.

Here's a very useful guide to common hitchhikers: https://www.lionfishlair.com/hitchhikers-guide/

 

[Giraffe0621]

I've never seen a bristle worm this color and I have many; good detritivores and add needed diversity IMHO. Might study his head and search for eunicid worm

I googled eunicid worm and seriously regret doing so. HOLY COW I think this guy may get removed now, as if I put him in the sump, there's no guarantee he'll stay there, right?

And love the Hitchhiker's Guide link -- thank you!!!

 

[cracker]

those things give me the creeps ! It's those flesh rending mouth parts ! Yikes. I wonder how big they get in the ocean depths.

 

[Giraffe0621]

In case that yellow guy wasn't weird enough for you guys... here are his cousins, one yellow AND green dude who literally has a yellow head & green back half, and his buddy who is green with yellow fringe. Nature, it's official, you've outdone yourself

 

[Mikedawg]

Green one might be a vegetarian bristleworm...............ha ha. You really got some "live" rock.

 

[Katrina71]

Cool looking.