Atlantic Mannagrass vs Common Seal

Glyceria obtusa compared with Phoca vitulina

Key Differences

• Atlantic Mannagrass is Least Concern while Common Seal is Near Threatened.

Taxonomic Classification

Rank	Atlantic Mannagrass	Common Seal
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Liliopsida (Monocots)	Mammalia (Mammals)
Order	Poales (Grasses)	Pinnipedia (Seals & Sea Lions)
Family	Poaceae (Grass Family)	Phocidae (True Seals)
Genus	Glyceria	Phoca (Harbor Seals)
Species	Glyceria obtusa	Phoca vitulina

Conservation Status

Atlantic Mannagrass

LC — Least Concern

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Physical Characteristics

Attribute	Atlantic Mannagrass	Common Seal
Diet	—	Carnivore
Average Lifespan	—	30 years
Average Length	—	1.7 m
Average Weight	—	80.0 kg

Habitat & Geographic Range

Atlantic Mannagrass

Habitat

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

Range

Found in Canada.

Common Seal

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (7 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Atlantic Mannagrass

The Atlantic Mannagrass (Glyceria obtusa) is a species in the genus Glyceria. It is currently classified as Least Concern on the IUCN Red List. Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Common Seal

The most widely distributed pinniped, harbor seals inhabit temperate and subarctic coastal waters of both the North Atlantic and North Pacific. Adults reach up to 130 kg and spend roughly equal time at sea hunting fish, squid, and crustaceans and hauling out on beaches or rocks to rest. Their large, expressive eyes are adapted for underwater vision in low light. Harbor seals are a critical food source for orcas, sharks, and polar bears.