Not a newb... but what in the holy mother of...

[king aiptasia]

Looks like a barnacle. If you see something that looks like a net flashing out of it, then definitely a barnacle

I'm kinda thinking that, not all barnacles hold the classic shape, a few bore almost tear shaped pits in the rocks to live in

 

[king aiptasia]

I'm kinda thinking that, not all barnacles hold the classic shape, a few bore almost tear shaped pits in the rocks to live in

I've seen them a bit in paleontology especially Acrothoracica trace fossils (not that this is his animal, most them are extremely small and they dont have the "crests" op's has

 

[king aiptasia]

theres also a couple polychaetes that can present similarly, so id need a better picture to fully determine

 

[vetteguy53081]

The image is sort of dark and hard to see on my cell phone screen but that sure looks like an abalone not to say it is.

 

[Mr_Knightley]

Looks like a scallop or possibly an oyster to me, the little fringes around the shell opening remind me of a flame scallop in shape.

 

[1guydude]

Pictures 8 and 9 i think...make me think feather duster.
D

 

[1guydude]

Click and swipe worked better for me.
D

 

[king aiptasia]

so theres a million very unrelated suggestions, lets start by talking about what is seen. There is a stiff shield like structure, it gets laid down for the rest the filter feeding part of the animal to expose its self to the water. the animal has relatively stiff projections on the body as a feeding apparatus. The main body of the animal is still concealed in the tube. Important pieces of information, is the shield one piece solid or is it divided into 2 equal halfs, are the halves seamed together or separate. I'd need to see the feeding apparatus in a slightly clearer shot to see the actual attachment and arrangement of the appendages.

 

[DaddyFish]

I should start staying up late and trolling R2R for all the freaky creatures coming out at night. And maybe see some cool marine life too!

 

[mvbrandt]

Just looks like a boring colored relative of a flame scallop.

 

[ReefBridge]

First, thank you all for pitching in with suggestions! I was able to get a video of it closing. It only closes when I put my hand above it and block the sump light a little bit. It seems like it is a filter feeder as it hasn’t moved, but it seems like the whole thing closes from multiple sides rather than two. I was able to get a video, so please check it out! I apologize for the loud crash in the video, that’s my wife banging some pots around. Feel free to watch it without sound.

 

[ReefBridge]

I’m actually not sure how to share videos on this... let me know if the embedded video worked.

 

[bcarm]

I only hear audio if what sounds like a pot clanging, no visuals.

 

[PBnJOnWheat]

I’m on my phone but it’s not working.

Also please dose copper that thing shouldn’t exist IMO. ;Dead;Blackeye;Clown;Cold;Vamp;Punch;Rage;Walkingdead

 

[ReefBridge]

 

[afishbestservedcold]

I’m on my phone but it’s not working.

Also please dose copper that thing shouldn’t exist IMO. ;Dead;Blackeye;Clown;Cold;Vamp;Punch;Rage;Walkingdead

NOOO its so cool and unique and free, why on earth would you kill it....?

 

[PBnJOnWheat]

NOOO its so cool and unique and free, why on earth would you kill it....?

I’m kidding lmaoooo

 

[ReefBridge]

Found a pictue that looks exactly like yours on another forum they said it was some kind of clam or mussle but could not determine the species.

Do you have a link to the forum?

 

[afishbestservedcold]

I’m kidding lmaoooo

tg haha, I was shocked over here

 

[PBnJOnWheat]

tg haha, I was shocked over here

Promote all life lol but it do be creepy and scary, should still live tho he just chillin