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🧬 Biological Classification (Kingdom to Species)Zalophus japonicus

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Carnivora

Family

Otariidae

Genus

Zalophus

Species

Zalophus japonicus

Mammalia🌊 Marine predator / filter feeder

Japanese Sea Lion

Zalophus japonicus (Japanese Sea Lion · ニホンアシカ)

🛡️ Conservation Status (IUCN Red List)EX (Extinct)

DDData Deficient

LCLeast Concern

NTNear Threatened

VUVulnerable

ENEndangered

CRCritically End.

EWExtinct in Wild

EXExtinct

🇰🇷 Marine Protected Species (Korea)

Geological Era

Extant

Diet

Marine predator / filter feeder

Length · Height

1.9~2.4m · No data

Mass · Top Speed

360kg · No data

Habitat & Fossil Locality

Rocks, sand, and grassy coasts (the East Sea coast and Dokdo according to the National List of Species of Korea)

💡 Everyday Comparisons for Size, Mass & Speed

💡 A male's body length of 2.4 m is slightly longer than a single bed (about 2 m) (Comparison).
💡 Its weight of 360 kg is about 36 bags of 10 kg rice (Comparison).
💡 The National List of Species of Korea records that it lived along the East Sea coast and on Dokdo, and today it is protected as a Marine Protected Species.

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)67

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

#강치#Zalophus japonicus

📖 1. Overview

The Japanese Sea Lion is an otariid listed in the National List of Species of Korea as "badasaja" (Korean name) that lived along the East Sea coast and on Dokdo. In its 2017 assessment, the IUCN classifies it as Extinct (EX).

🦴 2. Anatomy & Morphology

Males reached a body length of 190–240 cm and a weight of 360 kg, with short fur and clawed flippers.

🔍 3. Ecology & Behavior

It ate fish, cephalopods, and mollusks. During the breeding season one male gathered a harem of multiple females before dispersing afterward. Mothers carried young pups by the neck in their mouths and plunged into the sea when sensing danger.

🇰🇷 4. Connection to Korea

It is a Marine Protected Species and is listed in the National List of Species of Korea as "badasaja" (Korean name). It is recorded as having inhabited the East Sea coast and Dokdo.