Pond buildup, e.g

Usage examples of algae.

The algae naturally and continuously desalinated sea water, which was why its core was salty while its outer surface was wet with fresh water: it was oozing the fresh water out.

Nothing distracted the meerkats from their little lives of pond staring and algae nibbling.

A sloth’s hairs shelter an algae that is brown during the dry season and green during the wet season, so the animal blends in with the surrounding moss and foliage and looks like a nest of white ants or of squirrels, or like nothing at all but part of a tree.

It was striking-looking in an ugly sort of way, with a rugged, yellowish brown shell about three feet long and spotted with patches of algae, and a dark green face with a sharp beak, no lips, two solid holes for nostrils, and black eyes that stared at me intently.

The smell of spent hand-flare shells, and prayers at dawn, and the killing of turtles, and the biology of algae, for example.

In the algae that covered the shells of some hawks-bills I sometimes found small crabs and barnacles.

It seemed to be a variety of marine algae, but quite rigid, far more so than normal algae.

In cross-section it consisted of two concentric walls: the wet, slightly rough outer wall, so vibrantly green, and an inner wall midway between the outer wall and the core of the algae.

The algae had a light sweetness that outdid in delight even the sap of our maple trees here in Canada.

The tree did indeed grow right out of the algae, as I had seen from the lifeboat.

Evidently the algae covered the shore thickly, for it was all I could find.

Finally, I resolved the problem by driving an oar, handle first, deep into the algae and tethering the boat to it.

I thought it was a cramp, that perhaps I had poisoned myself with the algae.

After a few seconds, they went back to doing what they had been doing before I appeared, which was either nibbling at the algae or staring into the ponds.

I did not ask myself why the algae did this, or how, or where the salt went.