common bubble snail vs Incised halberd fern

Akera bullata compared with Tectaria incisa

Key Differences

• common bubble snail is Least Concern while Incised halberd fern is Not Evaluated.

Taxonomic Classification

Rank	common bubble snail	Incised halberd fern
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Tracheophyta
Class	Gastropoda (Gastropoda)	Polypodiopsida (Polypodiopsida)
Order	Aplysiida (Aplysiida)	Polypodiales (Polypodiales)
Family	Akeridae	Tectariaceae
Genus	Akera	Tectaria
Species	Akera bullata	Tectaria incisa

Conservation Status

common bubble snail

LC — Least Concern

Incised halberd fern

NE — Not Evaluated

Physical Characteristics

Attribute	common bubble snail	Incised halberd fern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

common bubble snail

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

Incised halberd fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Distributed across Brazil, Colombia, Cuba, and United States.

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.