Young ones, strange ones

I am, of course, referring to mushrooms.

Here are some young fly agarics, pretty as always:

Olympus XZ-1, 28mm, ISO100, f8, 1/3s

I don't know what this is, but is has a decidedly unpleasant colour:

Olympus XZ-1, 28mm, ISO100, f8, 1/2s

Some sea urchins on stalks:

Olympus XZ-1, 28mm, ISO100, f8, 1/2s

A silvery blob:

Olympus XZ-1, 28mm, ISO100, f8, 1/200s

I'm not sure the photo conveys it well, but this last one looked really metallic.