The macgilltail split from its ancestor the gilltail. It has moved to the Ittiz Coast where it has become an opportunistic hunter. It is so voracious that it will take on prey larger than itself such as the sail gillfin or diamiboard shocker. However there are still much larger predators it much look out for such as the triplefin snark.
It will lay its eggs in the sand in the many bays of Ittiz Coast. They travel in smaller packs in order to kill larger prey. However when the prey is killed they go into a freezing frenzy. They are very bold and aggressive. They will attack back any predator who seeks to eat them. Males tend to have brighter orange fins in order to attract a mate. When spawning the female will lay her eggs in the sand and then the male will fertilize them and then cover the eggs with his tail.