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🧬 Biological Classification (Kingdom to Species)Crocodylus porosus

Kingdom

Animalia

Phylum

Chordata

Class

Reptilia

Order

Crocodilia

Family

Crocodylidae

Genus

Crocodylus

Species

Crocodylus porosus

Reptilia🥩 Carnivore

Saltwater Crocodile

Crocodylus porosus (Saltwater Crocodile · イリエワニ)

🛡️ 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 (Mesozoic archosaur lineage)

Diet

Carnivore

Length · Height

6~7m · 80cm

Mass · Top Speed

1~1.2t · 29km/h

Habitat & Fossil Locality

Estuarine mangroves and coastal waters of Southeast Asia, northern Australia, and India

💡 Everyday Comparisons for Size, Mass & Speed

📏 Length 6m — ~1.2× the length of a mid-size sedan (4.9 m)
⚖️ Mass 1t — ~14.3× the mass of a 70 kg adult human
⚡ Speed 29km/h — ~0.8× Usain Bolt's 100 m world-record average speed (37.6 km/h)

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)72

⚡ Speed Index (400 km/h = 100)7

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

#바다악어#Crocodylus porosus#최대파충류#최강치악력

📖 1. Overview

The largest extant reptile at over 6 m in length and over 1 ton in weight, and a predator officially recognized as having the strongest jaw power among living animals with a measured bite force of 16,460 N.

🌐 Wikipedia Summary Extract
The saltwater crocodile is a crocodilian native to saltwater habitats, brackish wetlands and freshwater rivers from India's east coast across Southeast Asia and the Sundaland to northern Australia and Micronesia. It has been listed as Least Concern on the IUCN Red List since 1996. It was hunted for its skin throughout its range up to the 1970s, and is threatened by illegal killing and habitat loss. It is regarded as dangerous to humans.
Source: Wikipedia · CC BY-SA 4.0 · retrieved 2026-10-24

🦴 2. Anatomy & Morphology

Equipped with salt glands and a sophisticated 4-chambered heart bypass valve system, it ambushes underwater for over 1 hour before biting prey and executing a spinning 'death roll.'

🔍 3. Ecology & Behavior

It is a living fossil that diverged from Archosauria alongside dinosaurs and survived mass extinction.

🇰🇷 4. Connection to Korea

Ancient crocodyliform fossils have also been discovered in the Cretaceous Hasandong Formation of the Korean Peninsula, demonstrating links to Mesozoic river ecosystems in Korea.