Bigeye thresher vs Small Adder's-Tongue

Alopias pelagicus compared with Ophioglossum azoricum

Key Differences

• Bigeye thresher is Endangered while Small Adder's-Tongue is Critically Endangered.

Taxonomic Classification

Rank	Bigeye thresher	Small Adder's-Tongue
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Chordata (Chordates)	Tracheophyta
Class	Chondrichthyes (Cartilaginous Fish)	Polypodiopsida (Polypodiopsida)
Order	Lamniformes (Mackerel Sharks)	Ophioglossales (Ophioglossales)
Family	Alopiidae	Ophioglossaceae
Genus	Alopias	Ophioglossum
Species	Alopias pelagicus	Ophioglossum azoricum

Conservation Status

Bigeye thresher

EN — Endangered

Small Adder's-Tongue

CR — Critically Endangered

Physical Characteristics

Attribute	Bigeye thresher	Small Adder's-Tongue
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bigeye thresher

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

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

Small Adder's-Tongue

Habitat

Inhabits boreal forests and taiga within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Bigeye thresher

The Bigeye thresher (Alopias pelagicus) is a species in the genus Alopias. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.