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#20: coral

Sakura Pigma Micron 005 & 003, Schmincke Watercolors on 250 g/m² white watercolor paper

coral {noun} /ˈkɒr(ə)l/

a hard stony substance secreted by certain marine coelenterates as an external skeleton, typically forming large reefs in warm seas.

a sedentary coelenterate of warm and tropical seas, with a calcareous, horny, or soft skeleton. Most corals are colonial and many rely on the presence of green algae in their tissues to obtain energy from sunlight.

plus underwater antlers, of course.