Looks like it's from alien #heebeegeebees

[SilentSloth]

I recently removed like 90% of the algae from my tank WhooHoo! but it revealed lots of weird stuff.
1 rock has this snail shell looking thing with something that moves inside when I shine a light on it. It grew on a rock that I covered in Kalk and h202 to remove some aptasia.

The same rock also has this weird curly thick piece of algae on it.

please ID both is possible but I really want to know what the alien looking thing is.

the algae thing is white with a braided texture on it.
the shell/worm thing is red

 

[Sisterlimonpot]

Can you take pictures under normal light?

 

[SilentSloth]

yeah 1 sec

EDIT: added photos

 

[JasonK84]

Looks like a barnacle. Waiting for better pics with white light to confirm.

 

[Sisterlimonpot]

I was going to say vermited snails but waiting on better pic

 

[SilentSloth]

Looks like a barnacle. Waiting for better pics with white light to confirm.

Looks like a barnacle to me. Didn't know they were so weird looking. Why is it moving when I light it? Never even knew they can grow in reef tanks. Is it safe?

Edit: Huh could be a vermatid but I thought those were tiny swirly guys with a long point. Extra confused now.
found this post as well https://www.reef2reef.com/threads/some-sort-of-barnacle.336412/ but when I google it I only see the tiny swirly guys not this big one.

 

[JasonK84]

I was going to say vermited snails but waiting on better pic

I think you are right.

 

[Sisterlimonpot]

Vermited can be thick...

I pulled these out of my sump they get pretty big

 

[Sisterlimonpot]

What gives it away is the tube like structure. A barnicle wouldn't have that

 

[JasonK84]

Looks like a barnacle to me. Didn't know they were so weird looking. Why is it moving when I light it? Never even knew they can grow in reef tanks. Is it safe?

Edit: Huh could be a vermatid but I thought those were tiny swirly guys with a long point. Extra confused now.
found this post as well https://www.reef2reef.com/threads/some-sort-of-barnacle.336412/ but when I google it I only see the tiny swirly guys not this big one.

@Sisterlimonpot got it with the vermetid snail. It’s coiled like a snake. Seams to be a good sized one. Cover the hole with gel super glue. That’ll starve it.

 

[samnaz]

Looks like a vermited to me.

Green algae in the last two pics looks like Neomaris annulata:

 

[SilentSloth]

Well thank you all for the help. Just to clarify my big guy is the same as these little ones? so I should just scrape em all off or do they need to be removed after scraping

 

[GillMeister]

speaking of heebeegeebees. That was my first reaction to seeing a peanut worm in my first reef tank. I was ready to burn the house down until I found out they don't suck the brains out of your fish. Bobbit worms, on the other hand...

 

[samnaz]

Not sure if they are exactly the same species, but very similar yes. There seems to be a couple different variations of vermetid snails, skinny pointy ones, and flat thick larger ones like you have.