Milingu
thanks for sharing, so, this seems to be a thing! I see striking similarities between yours and mine, looks like the stripes are getting wider, and the new lines seem to be in a consistent orientation parallel to and along the edge of the opening.
I wonder if they were harvested in brackish or salty conditions, and this is the pattern in freshwater?!
Curious, to say the least!
Thanks so much for chiming in!
HarleyK