Help With Id ...

[chillyinCanada]

Squid Eggs is my guess

But then again perhaps:

The 60 foot long jet powered animal you’ve probably never heard of | Deep Sea News

No, more sure it's squid eggs, especially based on the last photo.

 

[tursiops]

Squid Eggs is my guess

But then again perhaps:

The 60 foot long jet powered animal you’ve probably never heard of | Deep Sea News

No, more sure it's squid eggs, especially based on the last photo.

Maybe, but maybe not.
Observations: Pyrosomes And Squid Eggs | The Blenny Watcher Blog
By the way, blennywatcher is Anna Deloach's site, of Ned and Anna Deloach fame (the Reef Fish ID books).

 

[chillyinCanada]

Fabulous either way!

The squid eggs seem to be a bit like a slinky in their formation, whereas the pyrosomes aren't.

If I ever get luck enough to see such large congregations, do you think that will help me tell the difference between them?

 

[chillyinCanada]

Oh, I've changed my mind. Not squid eggs because I don't see the slinky.