Cuttlefish egg bubble?

Maleci

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After lurking for a while I finally pulled the trigger and setup a small cuttlefish tank. After cycling and running the tank for a few months with a pair of chromis and some assorted macro I ordered some bandanesis eggs from bluezoo. The eggs arrived 2 weeks ago and appeared to have no issues and after acclimating I added them to breeder net.

So far none have hatched but this morning when I woke up I noticed a single egg appears to have a relatively large clear bubble growing out of it. It doesn't appear to have any holes in the egg or bubble from anything hatching and I haven't seen movement in the bubble while the main egg remains black. Does anyone have any idea what is happening or what caused the bubble? Is this normal? Google found a few vague references but nothing really detailed. I've attached a pic but the photo is bad through the breeder net mesh.
 

drgmcooke

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in my time with cuttles this means it has hatched or will hatch very shortly
 

Maleci

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I've noticed it doesn't seem to be active and just sits in the corner of the breeder net all day. Is that normal? I added a few live mysis of various sizes and they don't seem to illicit any response even when they walk over it exploring themselves. It's changed position once since it hatched. Aren't they usually more active and inquisitive?
 

Maleci

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Also this morning I noticed the egg sack detached and is floating around. Will they circle back and eat it or should I remove it?
 

Tentagal

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Usually we see bubbles like that when the egg casing has been breached from some kind of mechanical damage, possibly from the shipment. As the egg swells in later development, it pushes out the hole. These eggs tend to hatch prematurely, which could be why your little one isn't doing so well. I hope the others are still looking ok!
 

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