Spirobidae? No idea...

[Jennyw]

So, my daughter noticed that our crab had named itself Jen- but I'm curious what kind of "ink" she is using- spinuncula and spirobidae came up in the Google search.

Yes, I know I need to clean the glass.

The crab is officially a girl since her name is Jen apparently.

 

[James M]

Are you talking about the crabs white dots ?

 

[Jennyw]

Whatever is on the bottom of this crab shell. I drew arrows...

 

[James M]

Look similar to feather dusters

 

[KJ]

Feather dusters.