While out walking on Wednesday I spotted this large expanse of something white on the side of a huge old fallen tree and, of course, I had to investigate.

As I got closer, I realised it was the slime mould Ceratiomyxa fruticulosa, a mass of tiny translucent white tubes, often branched, clustered together like terrestrial coral or sea anemones.

As this plasmodium stage of a slime mould often only lasts a day or two, the timing of my walk was very lucky indeed.