common Atlantic octopus vs Fly Agaric

Octopus vulgaris compared with Amanita muscaria

Key Differences

common Atlantic octopus is Not Evaluated while Fly Agaric is Least Concern.
common Atlantic octopus is carnivore while Fly Agaric is decomposer.
common Atlantic octopus is 50.0x heavier than Fly Agaric.
common Atlantic octopus lives longer (2 years vs 1 years).

Taxonomic Classification

Rank	common Atlantic octopus	Fly Agaric
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Mollusca (Mollusks)	Basidiomycota (Club Fungi)
Class	Cephalopoda (Cephalopods)	Agaricomycetes (Mushrooms)
Order	Octopoda (Octopuses)	Agaricales (Gilled Mushrooms)
Family	Octopodidae (Common Octopuses)	Agaricaceae (Agarics)
Genus	Octopus (Octopuses)	Amanita (Amanitas)
Species	Octopus vulgaris	Amanita muscaria

Conservation Status

common Atlantic octopus

NE — Not Evaluated

Trend: Stable →

Fly Agaric

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	common Atlantic octopus	Fly Agaric
Diet	Carnivore	Decomposer
Average Lifespan	2 years	1 years
Average Length	60 cm	20 cm
Average Weight	5.0 kg	100 g

Habitat & Geographic Range

common Atlantic octopus

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Distributed across Chile, Denmark, Norway, Portugal, 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 Atlantic octopus

One of the most studied invertebrates in neuroscience and behavioral biology, common octopuses inhabit rocky reefs and seafloors in tropical and temperate coastal waters globally. Highly intelligent with distributed nervous systems — two-thirds of their 500 million neurons reside in their arms — they demonstrate tool use, problem-solving, and individual personalities. Masters of camouflage, they change skin color and texture in milliseconds. They have three hearts, blue copper-based blood, and extremely short lifespans of 1–2 years.

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.