Broadback cuttlefish vs common grey sea slug

Sepia savignyi compared with Aeolidia papillosa

Key Differences

• Broadback cuttlefish is Data Deficient while common grey sea slug is Least Concern.

Taxonomic Classification

Rank	Broadback cuttlefish	common grey sea slug
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class	Cephalopoda (Cephalopods)	Gastropoda (Gastropoda)
Order	Sepiida (Sepiida)	Nudibranchia (Nudibranchia)
Family	Sepiidae	Aeolidiidae
Genus	Sepia	Aeolidia
Species	Sepia savignyi	Aeolidia papillosa

Evolutionary Relationship

Broadback cuttlefish and common grey sea slug share a common ancestor at the Phylum level: Mollusca. (Mollusks)

Conservation Status

Broadback cuttlefish

DD — Data Deficient

common grey sea slug

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Broadback cuttlefish

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.

Broadback cuttlefish

The Broadback cuttlefish (Sepia savignyi) is a species in the genus Sepia. It is currently classified as Data Deficient on the IUCN Red List.

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.