Macroscopically, it looks of the color of the outer frame.
Compare to: https://www.inaturalist.org/observations/192147134
These were very small white orb like creatures with a worm-like body using appendages like paddles to swim
A local fisherman called this a sand fish. About 50cm long.
Parasite
NGA LTER, PWS2 VERT MULTINET
what are these little guys? we always find them on halibut