cornucopia of drifted still life in the upturned valve of a freshwater clam,

Leptodea fragilis,

with the aquatic snail
Bythinia tentaculata

at the top,

followed by a

Zebra Mussel,
Dreissena polymorpha,

a young Valvata tricarinata snail,

a translucent adult
Hydrobaeid snail,

a fish vertebra,

and beneath,

the clam Lampsilis radiata