Hooded seal vs ribbed grass snail

Cystophora cristata compared with Vallonia costata

Key Differences

• Hooded seal is Endangered while ribbed grass snail is Least Concern.

Taxonomic Classification

Rank	Hooded seal	ribbed grass snail
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Gastropoda (Gastropoda)
Order	Pinnipedia (Seals & Sea Lions)	Stylommatophora (Stylommatophora)
Family	Phocidae (True Seals)	Valloniidae
Genus	Cystophora	Vallonia
Species	Cystophora cristata	Vallonia costata

Evolutionary Relationship

Hooded seal and ribbed grass snail share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Hooded seal

EN — Endangered

ribbed grass snail

LC — Least Concern

Physical Characteristics

Attribute	Hooded seal	ribbed grass snail
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Hooded seal

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Denmark, Norway, and Portugal. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

ribbed grass snail

Habitat

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

Range

Widely distributed across Africa (South Africa), Asia (Israel), Europe (9 countries), North America (Mexico, United States), Oceania and the Pacific (New Zealand), and South America (Chile).

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal