This is taken under a x2 magnification, Taken from the Blackwater Estuary Essex sub tidal it has a rubbery texture and looks granular under a microscope.
No identification made yet.
No interactions present.
A few more clues are needed foe even a guess at an identification
Was this from the seaward end of the estuary? Was the bottom hard or soft? Was the specimen attached to anything else? What is the form of the specimen after it vanishes in the top right of the image?
Lat/Lng: 51.7332, 0.771
OS grid ref: TL914074