common hydra vs Fly Agaric

Hydra vulgaris compared with Amanita muscaria

Key Differences

common hydra is Not Evaluated while Fly Agaric is Least Concern.

Taxonomic Classification

Rank	common hydra	Fly Agaric
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Cnidaria (Cnidarians)	Basidiomycota (Club Fungi)
Class	Hydrozoa (Hydrozoa)	Agaricomycetes (Mushrooms)
Order	Anthoathecata (Anthoathecata)	Agaricales (Gilled Mushrooms)
Family	Hydridae	Agaricaceae (Agarics)
Genus	Hydra	Amanita (Amanitas)
Species	Hydra vulgaris	Amanita muscaria

Conservation Status

common hydra

NE — Not Evaluated

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	common hydra	Fly Agaric
Diet	—	Decomposer
Average Lifespan	—	1 years
Average Length	—	20 cm
Average Weight	—	100 g

Habitat & Geographic Range

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Fly Agaric

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Widely distributed across Europe (4 countries), North America (United States), Oceania and the Pacific (New Zealand), and South America (Brazil, Chile, Colombia).

common hydra

<em>Hydra vulgaris</em>, commonly known as the common hydra, is a small freshwater cnidarian in the family Hydridae. Its conservation status has not been formally evaluated by the IUCN. The species is recorded from Denmark, Norway, and Sweden, with its native range understood to encompass Europe broadly. It typically inhabits slow-moving or still freshwater bodies such as ponds, lakes, and streams, where it attaches to aquatic vegetation or submerged substrates. The common hydra is notable for its remarkable regenerative capabilities and has been the subject of substantial biological research. Diet information for this species is not available in current records. Biological traits of this species remain poorly documented in the scientific literature.

Fly Agaric

Among the most iconic and recognizable fungi on Earth, fly agaric mushrooms display striking red caps with white flecked warts across boreal forests of the Northern Hemisphere. Despite their fairy-tale appearance, they contain potent psychoactive compounds including muscimol and ibotenic acid and are moderately toxic. They form critical mycorrhizal symbioses with birch, pine, and spruce trees, exchanging mineral nutrients for carbon and playing essential roles in boreal forest nutrient cycling.