Snapjaw

Growing to a great size due to the effects of island gigantism, the snapjaw has come to replace its ancestor throughout the warmer regions of Fermi island, forming migratory herds that dominate the watering holes. Besides an increase in size, perhaps the most striking feature that has evolved is the coloration, at least within the males, that is. Females retain the similar yellowish hues of its ancestor, but males instead develop a reddish hue with prominent splotches and spots all over their bodies. This serves as a sexual display, for when males encounter one another or females that are in heat, the blood vessels near the surface of their skin (especially those within their crests) become flushed with blood and their colors become even more prominent.

While displaying colors alone is often enough to end most fights, sometimes rival males will refuse to back down. When this occurs, the two males will size each other up, and should neither yet back down following this, begin to ram one another. Their foreheads have developed protective domes to help them in this regard, as their ancestor's spikes are used primarily for display or for ramming at predators, mostly due to the width between them and the center of their bodies.

Winners of these fights will gain the right to mate with the herd's females, and will most often sire the most offspring compared to less successful males. Said offspring are laid into oasis' and such, whereupon they mature and eventually undergo metamorphosis into their adult phase. From here they will go out into the world and form new herds.