cup coral

American  

noun

1. any of several species of coral in which the polyp forms and houses itself in a cup-shaped depression in the skeleton.

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Example Sentences

Invasive cup coral has spread on World War II shipwrecks off Brazil.

From Salon

Scientists also worry about their tendency to attract non-native species, such as the orange cup coral, which kills and outcompetes native corals.

From Slate

One very common kind is called a cup coral, because the polyp formed a skeleton shaped like a cup.

From Project Gutenberg