common grey sea slug vs

Aeolidia papillosa compared with Pyrenula nitida

Key Differences

common grey sea slug is Least Concern while is Endangered.

Taxonomic Classification

Rank	common grey sea slug
Kingdom	Animalia (สัตว์)	Fungi (เห็ดรา)
Phylum	Mollusca (มอลลัสกา)	Ascomycota (Sac Fungi)
Class	Gastropoda (ชั้นแกสโทรโพดา)	Eurotiomycetes (Eurotiomycetes)
Order	Nudibranchia (ทากทะเล)	Pyrenulales (Pyrenulales)
Family	Aeolidiidae	Pyrenulaceae
Genus	Aeolidia	Pyrenula
Species	Aeolidia papillosa	Pyrenula nitida

Conservation Status

common grey sea slug

LC — Least Concern

EN — Endangered

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 and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Portugal, Sweden, and United States. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Pyrenula nitida is a corticolous crustose lichen producing a smooth, glossy olive-green to brown thallus with embedded, flask-shaped perithecia on smooth bark of ancient broadleaf trees in humid Atlantic woodland. It is considered a flagship indicator species for long-continuity, old-growth woodland in western Europe. Endangered, this lichen is severely threatened by the loss of veteran trees and ancient woodland habitats.