Fly Agaric vs Sea Lettuce

Amanita muscaria compared with Ulva fenestrata

Key Differences

Fly Agaric is Least Concern while Sea Lettuce is Not Evaluated.

Taxonomic Classification

Rank	Fly Agaric	Sea Lettuce
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Basidiomycota (Club Fungi)	Chlorophyta (Chlorophyta)
Class	Agaricomycetes (Mushrooms)	Ulvophyceae (Ulvophyceae)
Order	Agaricales (Gilled Mushrooms)	Ulvales (Ulvales)
Family	Agaricaceae (Agarics)	Ulvaceae
Genus	Amanita (Amanitas)	Ulva
Species	Amanita muscaria	Ulva fenestrata

Conservation Status

Fly Agaric

LC — Least Concern

Trend: Stable →

Sea Lettuce

NE — Not Evaluated

Physical Characteristics

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

Habitat & Geographic Range

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).

Sea Lettuce

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark and Norway.

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.