Common Seal vs Leatherback Sea Turtle

Phoca vitulina compared with Dermochelys coriacea

Key Differences

• Common Seal is Near Threatened while Leatherback Sea Turtle is Vulnerable.
• Leatherback Sea Turtle is 6.2x heavier than Common Seal.
• Leatherback Sea Turtle lives longer (50 years vs 30 years).

Taxonomic Classification

Rank	Common Seal	Leatherback Sea Turtle
Kingdom same	Animalia (동물)	Animalia (동물)
Phylum same	Chordata (척삭동물)	Chordata (척삭동물)
Class	Mammalia (포유류)	Reptilia (파충류)
Order	Pinnipedia (Seals & Sea Lions)	Testudines (거북)
Family	Phocidae (True Seals)	Cheloniidae (Sea Turtles)
Genus	Phoca (Harbor Seals)	Chelonia (Green Sea Turtles)
Species	Phoca vitulina	Dermochelys coriacea

Evolutionary Relationship

Common Seal and Leatherback Sea Turtle share a common ancestor at the Phylum level: Chordata. (척삭동물)

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Leatherback Sea Turtle

VU — Vulnerable

Population: ~35.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Common Seal	Leatherback Sea Turtle
Diet	Carnivore	Carnivore
Average Lifespan	30 years	50 years
Average Length	1.7 m	2.0 m
Average Weight	80.0 kg	500.0 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.

Leatherback Sea Turtle

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 5 distinct biome types spanning the Australasia and Indomalayan and Neotropic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Costa Rica, Indonesia, Malaysia, and Trinidad and Tobago. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Seal

가장 널리 분포하는 기각류인 항구물범(Phoca vitulina)은 북대서양과 북태평양 양쪽의 온대 및 아북극 연안에 서식한다. 성체는 최대 130kg에 달하며 바다에서 어류·오징어·갑각류를 사냥하고 해변이나 바위 위에서 쉬며 비슷한 시간을 보낸다. 크고 표정 풍부한 눈은 저조도 수중 시야에 적응되어 있다. 범고래·상어·북극곰의 중요한 먹이원이다.

Leatherback Sea Turtle

장수거북은 현존하는 가장 큰 거북이자 네 번째로 무거운 파충류입니다. 다른 거북과 달리 딱딱한 등갑이 없고 부드럽고 가죽 같은 껍질을 가집니다.