common arm squid vs Emperor Penguin

Brachioteuthis riisei compared with Aptenodytes forsteri

Key Differences

• common arm squid is Data Deficient while Emperor Penguin is Near Threatened.

Taxonomic Classification

Rank	common arm squid	Emperor Penguin
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum	Mollusca (động vật thân mềm)	Chordata (động vật có dây sống)
Class	Cephalopoda (động vật chân đầu)	Aves (chim)
Order	Oegopsida (Oegopsida)	Sphenisciformes (Penguins)
Family	Brachioteuthidae	Spheniscidae (Penguins)
Genus	Brachioteuthis	Aptenodytes (Great Penguins)
Species	Brachioteuthis riisei	Aptenodytes forsteri

Evolutionary Relationship

common arm squid and Emperor Penguin share a common ancestor at the Kingdom level: Animalia. (động vật)

Conservation Status

common arm squid

DD — Data Deficient

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Physical Characteristics

Attribute	common arm squid	Emperor Penguin
Diet	—	Carnivore
Average Lifespan	—	20 years
Average Length	—	1.1 m
Average Weight	—	40.0 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.

Emperor Penguin

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Emperor Penguin

The world's largest penguin, emperor penguins stand up to 1.2 meters and weigh 45 kg, inhabiting the Antarctic continent in some of the most extreme conditions on Earth. They breed in midwinter darkness at temperatures below -60°C, with males incubating single eggs on their feet under a brood pouch for 65 days while females are at sea. Their huddling behavior — cycling individuals through the warm center of thousands-strong groups — is a masterclass in cooperative survival.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway