Additional Creatures Wiki

Eastmanosteus are fish in Additional Creatures.


Wild -

Deep-sea fish are generally terrifying, and Eastmanosteus easily takes the title of the most terrifying deep-sea fish I ever witnessed. Living in the darkest depths of the island’s abyssal water, they are fairly slow, even placid, lethargic fish. However, make no mistake……Eastman are ravenous predators.

I can best compare Eastmanosteus to a modern-day Sixgill Shark. It is a deep-sea predator which, although slow by nature, is capable of attaining surprising speeds when chasing prey….as a matter of fact, Eastmanosteus are all about food. Whenever death reaches the abyss, Eastmanosteus are able to sense it from a considerable distance, and rush in to feast… such, they are also SOMETIMES lured up to the surface by fresh meat, although this is usually during the night. Their powerful, double-hinged jaws tear and puncture flesh much more easily than the jaws of their larger relative, Dunkleosteus. In comparison, Dunkle is more of a crusher; while Eastman takes clean, savage bites to tear through flesh!

Domesticated - Where to begin….Eastmanosteus’s powerful jaws are easily a formidable weapon, able to tear through all kinds of armor and slice down smaller foes in an instant, with those who haven’t been killed suffering profuse bleeding. Also as a placoderm, its natural armor protects it from attack. Its slow metabolism also means it is easier to maintain than most other creatures. Its thick armor also means most ocean creatures don’t bother to attack it!

HOWEVER, Eastmanosteus’s thick armor prevents knockout taming. This means one must offer Eastmanosteus food in order to domesticate it….yet like most denizens of the abyss, Eastmanosteus has a strict “don’t waste food” policy: instinctively, it’ll always snap at anything vaguely close to its head or immediate vicinity. To any survivor vaguely close to its jaws, this is an almost guaranteed instant death, as it is easily capable of killing a survivor regardless of armor in one single bite!

Color Regions

346110 screenshots 20180917221124 1.jpg

Eastmanosteus lack color regions, so they all look like the individual above.

Base Stats, Controls, and Abilities

Attribute Base Stat
Health 649
Stamina 529
Food 1380
Weight 649
Melee Damage 162%
Movement Speed 130%
Torpidity 10000

Left Click - Bite

82 Base Damage - Inflicts Bleed - Ignores and Shreds Armor

Has armor which makes it take only 40% of incoming damage.

Most marine life ignores tamed Eastmanosteus.

When passive-taming, Eastmanosteus will take entire stacks of food in a single bite rather than one at a time.

Being primarily scavengers, they detect corpses from very far away.


  • Eastmanosteus glow in the dark.
  • Eastmanosteus are inspired by abyssal fish, particularly the sixgill shark.
  • Eastmanosteus means "Eastman's Bone" being named after its discoverer, with nullaspirita meaning "void spirit".
  • Eastmanosteus is a predatory placoderm fish, being closely related to the larger and more well-known Dunkleosteus.
  • Eastmanosteus was originally a part of the original Additional Creatures mod, but has since been moved to Additional Creatures: Aquaria.