Australian Bur-grass vs common bubble snail

Tragus australianus compared with Akera bullata

Key Differences

• Australian Bur-grass is Not Evaluated while common bubble snail is Least Concern.

Taxonomic Classification

Rank	Australian Bur-grass	common bubble snail
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Mollusca (Mollusks)
Class	Liliopsida (Monocots)	Gastropoda (Gastropoda)
Order	Poales (Grasses)	Aplysiida (Aplysiida)
Family	Poaceae (Grass Family)	Akeridae
Genus	Tragus	Akera
Species	Tragus australianus	Akera bullata

Conservation Status

Australian Bur-grass

NE — Not Evaluated

common bubble snail

LC — Least Concern

Physical Characteristics

Attribute	Australian Bur-grass	common bubble snail
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Australian Bur-grass

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Widely distributed across Europe (4 countries), North America (United States), and South America (Bolivia).

common bubble snail

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and Sweden.

Australian Bur-grass

The Australian Bur-grass (Tragus australianus) is a species in the genus Tragus. Typically found in grasslands, wetlands, forests, and cultivated landscapes. Tragus australianus contributes to the biodiversity of its native ecosystems.

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.