Coralline means 'resembling coral' and may refer to:
- Coralline algae, or corallines, red algae that produce calcareous deposits
 - Less commonly, organisms that resemble coral, such as certain bryozoans, hydrozoans, or coralline sponges
 - The calcareous material in coral reefs
 - Coralline rock, produced by coralline algae
 - Something having a red coral colour
 
See also
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