Brown Cup vs common grey sea slug

Rutstroemia firma compared with Aeolidia papillosa

Taxonomic Classification

Rank	Brown Cup	common grey sea slug
Kingdom	Fungi (เห็ดรา)	Animalia (สัตว์)
Phylum	Ascomycota (Sac Fungi)	Mollusca (มอลลัสกา)
Class	Leotiomycetes (Leotiomycetes)	Gastropoda (ชั้นแกสโทรโพดา)
Order	Helotiales (Helotiales)	Nudibranchia (ทากทะเล)
Family	Rutstroemiaceae	Aeolidiidae
Genus	Rutstroemia	Aeolidia
Species	Rutstroemia firma	Aeolidia papillosa

Conservation Status

Brown Cup

LC — Least Concern

common grey sea slug

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Brown Cup

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

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

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.

Brown Cup

The Brown Cup (Rutstroemia firma) is a species in the genus Rutstroemia. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and South America, inhabiting ecosystems characteristic of the region.

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.