arrow-finned squid vs Brook Floater

Illex oxygonius compared with Alasmidonta varicosa

Key Differences

• arrow-finned squid is Least Concern while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	arrow-finned squid	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class	Cephalopoda (Cephalopods)	Bivalvia (Bivalvia)
Order	Oegopsida (Oegopsida)	Unionida (Unionida)
Family	Ommastrephidae	Unionidae
Genus	Illex	Alasmidonta
Species	Illex oxygonius	Alasmidonta varicosa

Evolutionary Relationship

arrow-finned squid and Brook Floater share a common ancestor at the Phylum level: Mollusca. (Mollusks)

Conservation Status

arrow-finned squid

LC — Least Concern

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	arrow-finned squid	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

arrow-finned squid

Brook Floater

Habitat

Native to North America, inhabiting ecosystems characteristic of the region.

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

arrow-finned squid

The Arrow-finned squid, Illex oxygonius, is a species. It is currently assessed as least concern on the IUCN Red List.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.