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🧬 Biological Classification (Kingdom to Species)Sepia officinalis

Kingdom

Animalia

Phylum

Mollusca

Class

Cephalopoda

Order

Sepiida

Family

Sepiidae

Genus

Sepia

Species

Sepia officinalis

Cephalopoda🌊 Marine predator / filter feeder

Common cuttlefish

Sepia officinalis (Common cuttlefish · ヨーロッパコウイカ)

🛡️ Conservation Status (IUCN Red List)LC (Least Concern)

DDData Deficient

LCLeast Concern

NTNear Threatened

VUVulnerable

ENEndangered

CRCritically End.

EWExtinct in Wild

EXExtinct

Geological Era

Extant

Diet

Marine predator / filter feeder

Length · Height

60cm · No data

Mass · Top Speed

2~4kg · No data

Habitat & Fossil Locality

Sandy and muddy bottoms of the eastern Atlantic and the Mediterranean, from shallow waters down to 200 m deep

💡 Everyday Comparisons for Size, Mass & Speed

💡 Its maximum weight of 4 kg is 1/5 of a 20 kg bag of rice (Comparison).
💡 Its mantle length of 60 cm is the length of two 30 cm rulers placed end to end (Comparison).
💡 It is harvested commercially for food, its ink is used for dyes and paint, and its cuttlebone is given to pet birds as a nutritional supplement and to keep their beaks in good condition (ADW positive impacts for humans).

Reference standards: coach bus ~12 m, mid-size car ~4.9 m, compact car ~1 t, basketball hoop 3.05 m, credit card 8.56 cm.

📊 Mass & Speed Index (0–100)

⚖️ Mass Index (Blue Whale ~190 t = 100, log scale)40

Site-computed relative index from recorded values; not a formal scientific metric.

#갑오징어#Sepia officinalis

📖 1. Overview

The common cuttlefish is a cuttlefish living on shallow sea bottoms of the eastern Atlantic and the Mediterranean, famous for its ability to change skin color in an instant.

🦴 2. Anatomy & Morphology

Inside its broad, flattened mantle is an internal shell called a cuttlebone, along with beak-like jaws and large eyes. Special structures in its skin allow it to change color and texture within seconds.

🔍 3. Ecology & Behavior

It hides in sand by day and is active at night, camouflaging itself to match its surroundings as it approaches crustaceans and fish to catch them. It breeds in shallow waters in spring and summer and moves to depths of 100–200 m in autumn and winter.

🇰🇷 4. Connection to Korea

There is no record of this scientific name on the National List of Species of Korea. SeaLifeBase notes that this species is a prized food ingredient in Japan, Korea, Italy, and Spain.