The Rift Mosasaurus gives live birth after mating, skipping the egg-incubation step entirely. Gestation takes approximately 8 hours at default rates.

The baby Rift Mosasaurus takes approximately 7 days and 17 hours to fully mature at default rates - at a glacially slow pace - plan for a multi-day commitment. The most labor-intensive part is the baby phase (0–10% maturation) when it can't use a Feeding Trough yet.

Each baby inherits stats from both parents with a chance of mutation - +2 wild levels to a random stat plus a color change. Use the breeding calculator to plan food requirements, incubation timers, and maturation phases.

The Rift Mosasaurus's growth progresses through three stages: Baby (0–10%) lasts ~1111 min and requires constant hand-feeding. Juvenile (10–50%) spans ~74h - it can eat from a Trough now. Adolescent (50–100%) takes ~93h - continues eating from troughs, nearly fully grown.

Imprint bonuses are significant: a fully imprinted Rift Mosasaurus gains 30% extra damage and damage resistance with its imprinter mounted. Imprint requests include cuddling, walks, and specific kibble - check the wiki for which kibble to stockpile.

The raising calculator above shows exactly how much food you need for each maturation phase of the Rift Mosasaurus. Expect ~1111 minutes of active care during the Baby phase before it graduates to trough-feeding as a Juvenile.

The multiplier feature helps plan large-scale Rift Mosasaurus raises by totaling food across all babies. Different food types have different spoil timers - factor that into which food you stockpile.

ARK: Survival Ascended features the Rift Mosasaurus as an aquatic, carnivore creature that survivors will encounter in the wild. It belongs to the Variant category.

Its base Melee Damage sits at 100%, giving it respectable melee power. Starting at 3,600 Health, it's one of the toughest creatures in the game. Stamina sits at 400 base, providing solid stamina reserves. Weight capacity starts at 1300, giving it an enormous weight pool.

The Rift Mosasaurus roams the ARK as a wild, untamable creature. It gives live birth after a gestation period, making breeding straightforward. Defeating one in the wild grants 15 base XP. It can be cloned at a Cloning Chamber for 0.88 Element plus 0.01 Element per level.