Common Seal vs Grass-Leaf Mud-Plantain

Phoca vitulina compared with Heteranthera dubia

Key Differences

Common Seal is Near Threatened while Grass-Leaf Mud-Plantain is Least Concern.

Taxonomic Classification

Rank	Common Seal	Grass-Leaf Mud-Plantain
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Magnoliophyta (Flowering Plants)
Class	Mammalia (Mammals)	Liliopsida (Monocots)
Order	Pinnipedia (Seals & Sea Lions)	Commelinales (Commelinales)
Family	Phocidae (True Seals)	Pontederiaceae
Genus	Phoca (Harbor Seals)	Heteranthera
Species	Phoca vitulina	Heteranthera dubia

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Grass-Leaf Mud-Plantain

LC — Least Concern

Physical Characteristics

Attribute	Common Seal	Grass-Leaf Mud-Plantain
Diet	Carnivore	—
Average Lifespan	30 years	—
Average Length	1.7 m	—
Average Weight	80.0 kg	—

Habitat & Geographic Range

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.

Grass-Leaf Mud-Plantain

Habitat

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

Range

Distributed across Canada and United States.

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.