Infected Tooth

Teeth for jaundice barnacles

Among the infected body parts the wiki ties to the Aquatica release is the Infected Tooth; our records list it for ARK: Survival Ascended. In-game it reads "An infected tooth. Can be used to apply infected augments to creatures." Survivors bring it to the Infectarium for barnacles, and it can also be eaten for a brief buff.

Which corpses give Infected Teeth

Harvest the body of an Abyssal Rex or an Abyssal Yutyrannus after the kill. The Abyss biome is home to both, and they also turn up in high-tier Rifts. Bodies in corrosive areas are another source of teeth and of other infected parts. Harvesting such a body to the end brings on a spore debuff, which the wiki likens to the fertile spores of Aberration.

Tooth barnacles

At an Infectarium, Infected Teeth become part of Infected Barnacles. A barnacle made with them improves the odds of inflicting Jaundice, a damage-over-time effect, when the creature attacks.

Eating one

A survivor who eats a tooth takes 25 damage and recovers 10 food. Movement speed goes up, and food and water drain about 20% faster for the duration. Melee damage appears on the buff icon, yet the wiki reports no actual effect. Tames can be force-fed a tooth for extra movement speed; it neither hurts them nor raises their damage output. The buff lasts 30 seconds and does not stack: a fresh tooth during the buff just restarts the 30 seconds.

Weight and spoiling

A tooth weighs 0.1, and up to 100 fit in one stack, which then weighs 10. The wiki counts it as meat with a spoil timer.