#0635 · Generation V
What Animal Is Hydreigon Based On?
Hydreigon is mostly a fantasy design, but its closest real animal is the Common Hydra.
Closest animal
Common HydraConfidence
Broad or mixed-animal match
How Hydreigon compares to the real Common Hydra
Hydreigon's official category is the Brutal Pokémon. AnimalDex rates its resemblance to the Common Hydra as a broad match, meaning the animal is one influence in a largely fantasy design. Hydreigon is a three-headed dragon whose name and design come from the Hydra myth. The common hydra, which regrows its body parts, is the nearest animal by name.
The comparison covers looks and behavior cues, not biology: Hydreigon is a fictional Pokémon, while the Common Hydra (Hydra vulgaris) is a real animal. On AnimalDex the real Common Hydra scores 4 for dominance, 1 for speed, 1 for size and 2 for intelligence, out of 100, so its strongest trait is dominance.
Official category: Brutal Pokemon. This page is an AnimalDex comparison for real-animal resemblance, not an official design-origin claim.
Meet the real Common Hydra
Hydra vulgaris
Hydra are tiny freshwater cnidarians with tentacles, stinging cells, and strong regenerative ability. Their simple body plan keeps replacing, budding, and repairing instead of relying on armor or size.
How to recognize it
- Slender tubular body, a few millimetres to about 2 centimetres long
- Ring of thin tentacles around the mouth at the top
- Sticky basal disc gripping plants or stones
Real Common Hydra facts
- It has no brain, only a simple net of nerve cells spread through the body wall.
- It can move by somersaulting, bending over to plant its tentacles and flipping its base end over end.
- Diet
- Water fleas, copepods, small worms and insect larvae. Prey brushing a tentacle is paralysed by stinging cells, pulled to the mouth and swallowed whole.
- Lifespan
- Individuals in laboratory cultures show little or no sign of ageing and have been kept for many years; lifespan in the wild has not been measured.
- Predators and threats
- Flatworms, some water snails and small fish eat hydras, and certain ciliates graze on them. Stinging cells deter many attackers, and damaged tissue is quickly regrown.
| Dominance | Speed | Size | Intelligence |
|---|---|---|---|
| 4/100 | 1/100 | 1/100 | 2/100 |
Hydreigon animal FAQ
- What animal is Hydreigon based on?
- Hydreigon is mostly a fantasy design, but its closest real animal is the Common Hydra. Hydreigon is a three-headed dragon whose name and design come from the Hydra myth. The common hydra, which regrows its body parts, is the nearest animal by name.
- Is Hydreigon a real animal?
- No. Hydreigon is a fictional Pokémon. Its closest real counterpart is the Common Hydra (Hydra vulgaris), which AnimalDex covers with real field-guide facts.
- What is the real Common Hydra like?
- Hydra are tiny freshwater cnidarians with tentacles, stinging cells, and strong regenerative ability. Their simple body plan keeps replacing, budding, and repairing instead of relying on armor or size.
- Which other Pokémon are based on the Common Hydra?
- AnimalDex also pairs Deino and Zweilous with the Common Hydra.
More Common Hydra comparisons in Generation V
| No. | Pokemon | Closest animal | Basis |
|---|---|---|---|
| #0633 |  Deino | broad | |
| #0634 |  Zweilous | broad |