Coral

Coral is a species of marine animals. Coral secretion is what makes coral reef. Because of coral's appearance, it is a common misconception that coral is a type of plant or algae, rather than an animal. Superman apparently thought this to be the case.

During the Cosmic Crisis, Marvin sent a message to the Super Friends on a piece of paper. Using the Justice League spectral analyzer, they were able to find traces of coral particles on it.

Appearances
Super Friends
 * Season 1: Too Hot to Handle