What is this Clear Sac?

[kdragon64]

Merry Christmas everyone.

Can anyone please help me ID this thing that showed up in my tank this Christmas morning? Not sure if it's a nice gift or a Trojan horse.

It's clear and has some white spots within it, it sways in the flow like it's some type of gel. Just showed up this morning on one of my rocks. Only attached at the bottom.

 

[mamedina]

If you have bubble algae could be a popped vesicle

 

[Lazys Coral House]

It looks like a mucus bubble from a wrasse or other fish that creates them. They do it when they sleep so predators can’t smell them

 

[Lovemyreef2015]

Looks to be a sleeping cocoon, mucus produced by the fish sleeping. Any wrasses in the tank?

 

[kdragon64]

Thanks so much for the quick responses, however, I have never had any bubble algae in the tank and the only wrasse that I have is the blue line cleaner wrasse that I've had for about 8 months and never made this before, it's smaller than the fish, and the fish doesn't seem to ever stay still long enough to use this thing. I was thinking it could be some type of egg sac? I really don't know though. The only fish that have a possible mate is the clownfish, but this doesn't appear like the pics of their eggs. Otherwise, I have a bunch of snails that I thought maybe created it, but I have no idea which snails it may be.

 

[Lazys Coral House]

It is from the cleaner wrasse. It makes a new one every night.

 

[Zack K]

Agreed. wrasses makes a new sac every time they fall asleep. Most of the time it is just blown away before you can spot it.

 

[4FordFamily]

Cleaner wrasse is your likely culprit.

 

[kdragon64]

Ok, thank you all. Sounds like a strong consensus. I learn something new in this hobby practically every day.

 

[NormanB]

I know this is an old thread, but I have the same thing and no wrasses in the tank.

 

[TracyLynn]

I have found this randomly in my tank as well, I have a Blue line cleaner wrasse. Apparently Parrot fish make this sleeping cocoon as well.
Older article about it here:

Fish build mucus cocoons to fend off parasites

Just as some people must sleep with mosquito nets to ward off the bloodsuckers, coral reef fish apparently spin cocoons of mucus before slumbering to keep away biting parasites, scientists find.

www.nbcnews.com

 

[Tahoe61]

I know this is an old thread, but I have the same thing and no wrasses in the tank.

Can you grab an image.

 

[NormanB]

 

[Tahoe61]

Do you have Damsels? That looks like an egg mass.

Thanks for the image.

 

[NormanB]

1 chromis...and that sack is bigger than it is

 

[Tahoe61]

What other fish types? Damsel, Clowns and and Chromis can leave such an egg mass.
Have any cucumbers?

 

[NormanB]

1 clown 1 yellow tang 1 hippo tang 2 pajama cardinals 1 starry blenney 1 blue chromis

 

[Tahoe61]

Google (images of Chormis Eggs).

 

[Lovefish77]

Thanks everyone, I have had a six line wrasse for 2 months and I have been seeing those sacs especislly in the morning

 

[Cell]

Ever see The Abyss?