shelf fungus

Then there was a tremor in the shelf-fungus on which he lay.

He thought of the leaves of the palm tree, the white under surface of the shelf fungus.

Then he felt himself drawn upward as the crayfish disgustedly released its hold and the shelf-fungus floated slowly upward.

Burl laughed again as a particularly large lump of shelf-fungus narrowly missed the black-and-silver figure below.

The agglomeration of cranky, unseaworthy bits of shelf-fungus moved slowly out from the shore until the current caught it.