- Hatch weight: 7.5 kg
- Weight at age 50: 40.91 kg
- Weight at age 100: 75.00 kg
Pet weight calculator · Spinosaurus ability calculator · Pet calculator hub
River King positions Spinosaurus as the water-column counterpart to T-Rex—7.5 hatch, mythical tier, and abyssal/wet synergy that ocean plot builders treat as non-negotiable.
Pet weight calculator · Spinosaurus ability calculator · Pet calculator hub
Spinosaurus hatches at 7.5 kg and grows with the formula W = (hatch ÷ 11) × (age + 10). The table below projects its weight at each age milestone so you can plan trade timing and weight targets.
| Age | Projected weight |
|---|---|
| Age 1 | 7.50 kg |
| Age 25 | 23.86 kg |
| Age 50 | 40.91 kg |
| Age 75 | 57.95 kg |
| Age 100 | 75.00 kg |
| Age 125 | 92.05 kg |
Assign Spinosaurus to ocean or river-adjacent tiles and stack with Otter, Dolphin, or Octopus for wet mutation chains. Activate River King before rain cycles when Wet procs double up. Land-only gardeners should trade Spinosaurus for T-Rex rather than idle it on dry rows.
W = (7.5 ÷ 11) × (age + 10) caps at 75 weight when age is 100—marginally lighter than T-Rex but still heavy mythical class. Age 50 ≈ 40.9 on the weight calculator.
River King amplifies Abyssal and Wet mutation synergy on water-aligned crops, multiplying deep-water sell values. Farming requires water plots; trading stays strong among ocean specialists even when general tier lists rank burst legendaries higher.
Wet mutation spikes during rain; Abyssal adds depth-tier multipliers on ocean crops. Spinosaurus links both—harvest after rain ends if timers allow proc persistence.
Void Serpent adds void/abyssal multiplier increases on separate rows; do not duplicate abyssal pets on one tile cluster without testing caps.
Spinosaurus value searches lag Dragonfly but ocean traders pay Win rates against generic A-tier mythicals.
When trading vs T-Rex, Spinosaurus wins for wet builds; T-Rex wins for petrified land—Sheckle adjustments common for fair swaps.
Level on ocean plots during rain events so River King ticks align with XP farming sessions.
Max weight 75 at age 100—note hatch 7.5 in listings to distinguish from lighter reptile pets.