Staghorn is a term used to describe three different organisms: a FERN, a CORAL, and a platycerium. The FERN, also known as a stag's horn FERN, is an evergreen perennial with fronds that resemble the antlers of a stag. The CORAL, also known as staghorn CORAL, is a type of hard CORAL found in shallow waters of the Caribbean Sea. The platycerium, also known as a staghorn FERN, is a species of epiphytic FERN native to tropical regions of the world. All three organisms share the common name of staghorn due to their antler-like shape.