arrow-finned squid vs common bubble snail

Illex oxygonius compared with Akera bullata

Taxonomic Classification

Rank	arrow-finned squid	common bubble snail
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class	Cephalopoda (Cephalopods)	Gastropoda (Gastropoda)
Order	Oegopsida (Oegopsida)	Aplysiida (Aplysiida)
Family	Ommastrephidae	Akeridae
Genus	Illex	Akera
Species	Illex oxygonius	Akera bullata

Evolutionary Relationship

arrow-finned squid and common bubble snail share a common ancestor at the Phylum level: Mollusca. (Mollusks)

Conservation Status

arrow-finned squid

LC — Least Concern

common bubble snail

LC — Least Concern

Physical Characteristics

Attribute	arrow-finned squid	common bubble snail
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

arrow-finned squid

common bubble snail

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

arrow-finned squid

The Arrow-finned squid, Illex oxygonius, is a species. It is currently assessed as least concern on the IUCN Red List.

common bubble snail

The common bubble snail (<em>Akera bullata</em>) is a marine gastropod mollusc found in the coastal waters of Denmark, Norway, Portugal, and Sweden. This species typically inhabits terrestrial and aquatic environments including forests and freshwater-adjacent marine areas, often occurring in shallow subtidal and intertidal zones of temperate European seas. It is classified as Least Concern on the IUCN Red List. As a member of the family Akeridae, the common bubble snail is characterized by its thin, fragile shell and its ability to swim briefly by flapping its large, wing-like parapodia. The species often forages on algae and detritus in sandy and muddy seafloor habitats, particularly in sheltered bays and estuaries. The common bubble snail typically aggregates in large numbers during the spawning season, producing gelatinous egg masses. Biological traits of this species remain poorly documented in the scientific literature.