What is it?

[1WildBill]

Did a water change this morning and found this. Any idea what it is? I tried catching it, and it feels slimy. When it gets into the current from a powerhead, it distorts and then goes back to the same shape. Almost looks like a jellyfish.

 

[DSC reef]

Do you have any wrasses? Almost looks like a mucus cocoon or bacteria mulm.

 

[1WildBill]

No. Stocking is 3 chromis, 1 damsel, 2 clowns, 1 hogfish, 1 barnacle Benny, 2 known bristle worms, snails, hermits, 1 conch and 1 chocolate chip starfish. Tank is a 75, Sump has a fuge and skimmer.

 

[DSC reef]

Polychaete worms can produce those sacks as well.

 

[Gareth elliott]

Its not, but season one of blue planet, the deep episode, reminds me of the ostracod inside the jellyfish.

What corals do you have some softies shed large amounts of mucus at once. My briareum does that.

 

[1WildBill]

1 RBTA nem, 1 candy cane, 1 bunch of Acans, 1 blasto, 1 favite, 1 favia and 1 chalice.

 

[Lovemyreef2015]

It looks like the egg casing from a polychaete worm. Here is a link. (Must download PDF to read).

https://www.tandfonline.com/doi/pdf/10.1080/00288330.1974.9515527

 

[1WildBill]

Thanks. Mystery solved. Very informative read.