Chugoku Blotched Salamander vs Green Sea Turtle

Hynobius sematonotos compared with Chelonia mydas

Key Differences

• Chugoku Blotched Salamander is Vulnerable while Green Sea Turtle is Endangered.

Taxonomic Classification

Rank	Chugoku Blotched Salamander	Green Sea Turtle
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class	Amphibia (Amphibien)	Reptilia (Reptilien)
Order	Caudata (Schwanzlurche)	Testudines (Schildkröten)
Family	Hynobiidae	Cheloniidae (Sea Turtles)
Genus	Hynobius	Chelonia (Green Sea Turtles)
Species	Hynobius sematonotos	Chelonia mydas

Evolutionary Relationship

Chugoku Blotched Salamander and Green Sea Turtle share a common ancestor at the Phylum level: Chordata. (Chordatiere)

Conservation Status

Chugoku Blotched Salamander

VU — Vulnerable

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Chugoku Blotched Salamander	Green Sea Turtle
Diet	—	Herbivore
Average Lifespan	—	80 years
Average Length	—	1.2 m
Average Weight	—	200.0 kg

Habitat & Geographic Range

Chugoku Blotched Salamander

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Green 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 8 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Australia, Brazil, Costa Rica, Indonesia, and Mexico. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Chugoku Blotched Salamander

The Chugoku Blotched Salamander (Hynobius sematonotos) is a Vulnerable salamander endemic to the Chugoku region of western Honshu, Japan. It belongs to the family Hynobiidae, the most basal family of living salamanders, with the greatest diversity concentrated in East Asia. Like other Hynobius species, H. sematonotos reproduces externally: females deposit paired egg sacs in small streams or water bodies, where males fertilize them externally before larvae hatch and develop in the water. Adults are terrestrial outside the breeding season, living under logs and leaf litter in cool forest habitats. The Chugoku Blotched Salamander is named for the distinctive blotched or marbled pattern of its dorsal coloration. Its Vulnerable status reflects ongoing habitat loss from deforestation, urbanization, and stream modification in the Chugoku region, which has experienced substantial land-use change. The species' dependence on small headwater streams for breeding makes it particularly sensitive to water quality degradation and hydrological alteration. Like many Japanese hynobiids, it faces additional threats from invasive species and pollution. Conservation of forested headwater catchments is essential for maintaining viable populations of this and related endemic Japanese salamanders.

Green Sea Turtle

The green sea turtle is one of the largest sea turtles. They are named for the green color of their cartilage and fat, not their shells.