Strange ballon like object

[Mjb51]

Every few months or so I see this strange kind of balloon object that floats around and then gets destroyed by a power head, it looks like its clear jelly balloon with brown bits of detritus in it it's about 2cm in length, as far as I now it comes out of one of the rocks in the tank blows up like a bubble and then comes free until it goes into the powerhead, does anyone have any idea what is creating this???


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[Istrom]

What inhabitants are in your tank?

 

[Mjb51]

I have added hermit crabs, turbo snails a conch and the fish, yellow tang, six line wrasse, regal damsels, bristletail filefish, fire fish and clown fish, as for hitchikers I have seen bristle worms, astrea stars copepods and amphipods, feather dusters bound to be other stuff that I've not seen as I can't imagine it could be anything above?


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[Istrom]

It's a mucus coat from the Six Line Wrasse. At night they make a cocoon from mucus for defense and in the morning they shed it. It's not harmful to anything in the tank.

 

[Mjb51]

Amazing would never have guessed that thankyou


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