Lost Rex
CreatureVariant
Breeding calculator
Lost Rex
SettingsHatch 1× · Mature 1× · Food 1× · Weight 500
Baby: The hatched dinosaur, now a baby, needs constant attention and food placed directly in its inventory to survive, or a nearby Maewing to take care of its needs.
- Gestation
- 8h 0m 0s
- Maturation
- 92h 35m 33s
- Food at birth
- 70.81/min
Maturation Progress
- Status:
- Baby
- Time Left:
- 87:57:46
- Total Time:
- 92:35:33
Maturation
- Incubation Time
- 8h 0m 0s
Elapsed Time- 4h 37m 47s
- Maturation Time Left
- 87h 57m 46s
Time to Juvenile- 4h 37m 47s
Food
- Total Food Items
- 3934items
- Food to Adult
- 2567items
- Food Per Hour
- 81
Food Capacity- 250items
Baby Hand Feed For- 1h 1m 55s6.1% maturation
Imprinting
- Cuddle interval
- 8h
- Imprint per cuddle
- 8.8%
- Maximum imprint
- 96.8% (11 cuddles)
Settings8 h · interval ×1 · amount ×1
Raising food
- Food per item
- 50
Stack size- 40
- Eats at 5%
- 67.27 food/min
- Maturation
- 92h 35m 33s
| Stage | Time remaining | Food points | Raw Meat | Stacks | Weight |
|---|---|---|---|---|---|
| BabyNeed this much for 5% to 10% | 4h 37m 46s | 18,194 | 364 | 10 | 36.4 |
| JuvenileNeed this much for 10% to 50% | 37h 2m 13s | 110,146 | 2,203 | 56 | 220.3 |
| AdolescentNeed this much for 50% to 100% | 46h 17m 46s | 49,172 | 984 | 25 | 98.4 |
| Total | 87h 57m 46s | 3,551 | 91 | 355.1 |
Total: 3,551 Raw Meat
- Feeding Trough
- 2,400 items (60 slots)Need 2 full loads
Tek Trough- 4,000 items (100 slots)Fits in one load
- Maewing / Maeguana
- 300 slots50% weight reduction on meat & berries
- Baby - 7x trough refills needed (food spoils before phase ends)
- Juvenile - 56x trough refills needed (food spoils before phase ends)
- Adolescent - 70x trough refills needed (food spoils before phase ends)
Spoils in 10m | Trough / Maewing: 40m | Tek Trough: 16h 40m
During the Baby phase (0-10%), you must hand-feed or use a Maewing to nurse. From Juvenile (10%+), dinos can eat from a Feeding Trough on their own. Use Preserving Salt in troughs to double spoil times.
More about breeding the Lost Rex
Full maturation from baby to adult takes ~3 days and 20 hours (1x rate), progressing at a glacially slow pace - plan for a multi-day commitment. Hand-feeding is required until 10% maturation. After that, a Feeding Trough handles the rest.
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 Lost Rex's growth progresses through three stages: Baby (0–10%) lasts ~556 min and requires constant hand-feeding. Juvenile (10–50%) spans ~37h - it can eat from a Trough now. Adolescent (50–100%) takes ~46h - continues eating from troughs, nearly fully grown.
Imprint bonuses are significant: a fully imprinted Lost Rex 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 Lost Rex. Budget ~556 minutes for the Baby phase - this is when hand-feeding or Maewing nursing is mandatory.
Raising multiple Lost Rex simultaneously? Set the dino count and the calculator scales food requirements automatically. Different food types have different spoil timers - factor that into which food you stockpile.
Found throughout the ARKs, the Lost Rex is a carnivore creature in ARK: Survival Ascended. It falls within the Variant classification.
At 1,100 base HP, the Lost Rex is quite durable. Dealing 100% base Melee Damage, the Lost Rex brings solid damage output to the table. Its base Stamina of 420 gives it solid stamina reserves. It carries 500 base Weight - an enormous weight pool.
The Lost Rex roams the ARK as a wild, untamable creature. Killing a wild Lost Rex yields 30 base XP. It can be cloned at a Cloning Chamber for 0.87 Element plus 0.01 Element per level.