a slow or gradual change from one thing to another; a slope or hill.

The coral animal

The anatomy of a coral polyp
A coral polyp sits within a corallite on the coral skeleton. It is a cup like divot where the polyp can slowly add carbonate to the colony. Image by NOAA, MarkusZi; translated by Earlza.

If you’ve seen a jellyfish or a sea anemone, then you may be more familiar with coral polyps than you think.

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