common arm squid vs Delfín tonina

Brachioteuthis riisei compared with Tursiops truncatus

Key Differences

• common arm squid is Data Deficient while Delfín tonina is Least Concern.

Taxonomic Classification

Rank	common arm squid	Delfín tonina
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (moluscos)	Chordata (cordados)
Class	Cephalopoda (Cefalópodos)	Mammalia (mamíferos)
Order	Oegopsida (Oegopsida)	Cetacea (Whales & Dolphins)
Family	Brachioteuthidae	Delphinidae (Oceanic Dolphins)
Genus	Brachioteuthis	Tursiops (Bottlenose Dolphins)
Species	Brachioteuthis riisei	Tursiops truncatus

Evolutionary Relationship

common arm squid and Delfín tonina share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

common arm squid

DD — Data Deficient

Delfín tonina

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Physical Characteristics

Attribute	common arm squid	Delfín tonina
Diet	—	Carnivore
Average Lifespan	—	45 years
Average Length	—	3.0 m
Average Weight	—	300.0 kg

Habitat & Geographic Range

common arm squid

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Chile and Norway.

Delfín tonina

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

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and South America (Colombia, Ecuador, Venezuela).

common arm squid

<em>Brachioteuthis riisei</em>, commonly known as the Common Arm Squid, is a cephalopod mollusk in the family Brachioteuthidae. This species is classified as Data Deficient on the IUCN Red List, reflecting significant gaps in knowledge about its population size, ecology, and distribution. Records of this species have been reported from waters off Chile and Norway, suggesting a broad oceanic distribution. Common Arm Squids are typically mesopelagic or bathypelagic organisms, inhabiting the open ocean at considerable depths during the day and often migrating toward shallower waters at night to feed. Like other oceanic squids, they are likely important components of marine food webs, serving as both predators of small fish and invertebrates and as prey for larger marine predators such as cetaceans and seabirds. The Data Deficient listing underscores the need for additional research into the biology, population dynamics, and conservation requirements of this understudied species. Biological traits of this species remain poorly documented in the scientific literature.

Delfín tonina

La especie de delfín más estudiada y reconocida, los delfines mulares habitan océanos cálidos y templados de todo el mundo, desde las aguas costeras poco profundas hasta el mar abierto. Altamente inteligentes con grandes cerebros en relación con el tamaño corporal, demuestran autoreconocimiento, comunicación compleja y aprendizaje social. Viven en sociedades fluidas de fisión-fusión y cooperan para arrear peces. Una especie indicadora clave de la salud del ecosistema marino.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway