common grey sea slug vs

Aeolidia papillosa compared with Mikrosyphar polysiphoniae

Taxonomic Classification

Rank	common grey sea slug
Kingdom	Animalia (Animals)	Chromista (Chromista)
Phylum	Mollusca (Mollusks)	Ochrophyta (Ochrophyta)
Class	Gastropoda (Gastropoda)	Phaeophyceae (Phaeophyceae)
Order	Nudibranchia (Nudibranchia)	Ectocarpales (Ectocarpales)
Family	Aeolidiidae	Chordariaceae
Genus	Aeolidia	Mikrosyphar
Species	Aeolidia papillosa	Mikrosyphar polysiphoniae

Conservation Status

common grey sea slug

LC — Least Concern

Physical Characteristics

Attribute	common grey sea slug
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

common grey sea slug

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Belgium, Chile, Denmark, Norway, and Sweden.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

common grey sea slug

<em>Aeolidia papillosa</em>, commonly known as the common grey sea slug, is a nudibranch mollusc belonging to the genus Aeolidia within the family Aeolidiidae. Despite the species name referencing terrestrial and aquatic habitats including forests and freshwater, <em>Aeolidia papillosa</em> is primarily a marine organism. Its range includes Belgium, Chile, Denmark, Norway, and Sweden, indicating a distribution across the North Atlantic and into South American waters. Common grey sea slug is assessed as Least Concern on the IUCN Red List. The species is typically found in intertidal and subtidal zones, where it preys on sea anemones and stores stinging cells from its prey in its dorsal cerata for defense. Biological traits of this species remain poorly documented in the scientific literature.

Mikrosyphar polysiphoniae is a small, endophytic brown alga in the order Ectocarpales that parasitizes red algae in the genus Polysiphonia. It penetrates into the cortical tissue of its host, forming small pustules visible on the host thallus surface. Assessed as Least Concern, it is found in temperate coastal marine environments in the Northern Hemisphere.