Groupers hover over brain corals or in giant sponges; a sort of expression on their would - be faces that lies between gloomy and grumpy. (belizeadventure.ca)
Most of the dive sites are pristine coral reefs with colorful soft corals and crinoids, vast staghorn coral fields and huge table corals in the shallow parts, giant elephant ears in the deeper parts, giant sponge barrels along the slopes. (twofishdivers.com)
Among the many benefits — the «ecosystem services» — that nature provides, forests act as giant sponges for the carbon dioxide in our atmosphere, serve as enormous filtration systems that provide clean water to millions of people, and contain an unfathomable amount of biodiversity, the advantages of which we haven't even begun to realize. (anthropozine.com)