brown hydra vs Fly Agaric

Hydra oligactis compared with Amanita muscaria

Key Differences

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

Taxonomic Classification

Rank	brown 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 oligactis	Amanita muscaria

Conservation Status

brown hydra

NE — Not Evaluated

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

brown 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).

brown hydra

The Brown Hydra (Hydra oligactis) is a species in the genus Hydra. Native to Europe, inhabiting ecosystems characteristic of the region. Distributed across Denmark, Norway, and Sweden. As a member of the Hydra genus, this species contributes to biodiversity in its native range.

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.