Caelus is a sky-blue pattern or secondary color for frogs. Caelus is Latin for "sky."
Caelus frogs are required for the following awards:
- Feeling Blue: all 3 frogs must be Blue Caelus: 1 each in the Adamantis, Viduo, and Stellata patterns
- Polka Party: 1 of 4 frogs must be a White Caelus Puncti
- River Rock: all 8 frogs must be Black Caelus Cesti
- Endangered 3: 1 of 2 frogs must be a Lime Caelus Lucus
- Legendary 1: 1 of 2 frogs must be a Violet Caelus Insero