The Signum species is a level 16 (legendary) breed of frogs. Although the word signum in Latin directly means stamp or emblem, signum can also mean constellation, more appropriate for the frog's galaxy-like pattern.
The Signum can be obtained via a special event message or bought in the FrogMart for 25 potions. The Signum frog has a unique design with various features. The primary color of the frog covers both sides, but leaves the head and the several spots in the secondary color. The secondary color that spreads from the head to the frog's back end has a gradient effect.