Brazier's Ear Shell vs Coastal Ragweed

Haliotis brazieri compared with Ambrosia hispida

Key Differences

• Brazier's Ear Shell is Near Threatened while Coastal Ragweed is Least Concern.

Taxonomic Classification

Rank	Brazier's Ear Shell	Coastal Ragweed
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Magnoliophyta (Flowering Plants)
Class	Gastropoda (Gastropoda)	Magnoliopsida (Dicots)
Order	Lepetellida (Lepetellida)	Asterales (Daisies & Sunflowers)
Family	Haliotidae	Asteraceae (Daisy Family)
Genus	Haliotis	Ambrosia
Species	Haliotis brazieri	Ambrosia hispida

Conservation Status

Brazier's Ear Shell

NT — Near Threatened

Coastal Ragweed

LC — Least Concern

Physical Characteristics

Attribute	Brazier's Ear Shell	Coastal Ragweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brazier's Ear Shell

Habitat

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

Range

Found in Australia. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Coastal Ragweed

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found in Cuba.

Brazier's Ear Shell

The Brazier's Ear Shell (Haliotis brazieri) is a species in the genus Haliotis. It is currently classified as Near Threatened on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Coastal Ragweed

Coastal ragweed (Ambrosia hispida) is a perennial herb in the family Asteraceae, native to the coastal dunes, sandy beaches, and cays of Cuba, the Bahamas, and the wider Caribbean region. It grows in pioneer beach and dune vegetation, often forming spreading colonies that help stabilise loose coastal sands. Like other members of the genus Ambrosia, it bears inconspicuous greenish-white flowers arranged in racemes; male flower heads produce wind-dispersed pollen that can trigger allergic rhinitis in sensitive individuals. The deeply lobed, hispid leaves are adapted to reflect intense solar radiation and tolerate salt spray. Coastal ragweed plays an ecological role in early dune succession, binding sand and enabling other plant species to establish. The genus is widespread globally, with several Ambrosia species considered noxious weeds in agricultural settings, though Ambrosia hispida is restricted to its native Caribbean coastal range. The IUCN assesses it as Least Concern, reflecting adequate population size across its Caribbean coastal distribution. Pressure from coastal development and tourism infrastructure poses a localised threat to dune communities it inhabits.