shallower

The Chinese subs are also largely built for the shallower South China Sea, where a game of cat-and-mouse with the US is already under way.

Stingrays come in at shallower depths because they’re more comfortable in calm, warm waters, he said.

However, compared to shallower waters, which are more easily subjected to changes in things like temperature, acidity or oxygen levels, these environmental changes take longer to reach the deep sea.

When Rachel's time comes, she wants a natural burial, which means using a biodegradable coffin or shroud in a shallower grave.

He notes that China’s shallower natural resources, within 500 meters of the surface, “are almost depleted.”