🪐 View in 3D Galaxy 📏 View on 3D Scale Stage

🧬 Biological Classification (Kingdom to Species)Rhodeus pseudosericeus

Kingdom

Animalia

Phylum

Chordata

Class

Actinopteri

Order

Cypriniformes

Family

Cyprinidae

Genus

Rhodeus

Species

Rhodeus pseudosericeus

📏 True-scale comparison (1 m = 1 m) against a 1.75 m humanLength 6.1cm

🔍 Zoomed View — Same scale as a credit card & 2.65cm coin

· Grid units represent actual meters (m); human and animals are drawn to the exact same scale with original silhouette aspect ratios preserved.
· When a size range is recorded (e.g. 1–1.6m), the lower bound is used for scale comparison.
· Han River bitterling silhouette: PhyloPic — George Chernilevsky · Public Domain Mark 1.0 (Rhodeus amarus)
· Human silhouette: PhyloPic — NASA · Public Domain Mark 1.0

• Length vs. 1.75 m human: 0.03× Compare with other species →

Actinopteri🍂 Omnivore

Han River bitterling

Rhodeus pseudosericeus (Han River bitterling · Han River bitterling)

🛡️ Conservation Status (IUCN Red List)VU (Vulnerable)

DDData Deficient

LCLeast Concern

NTNear Threatened

VUVulnerable

ENEndangered

CRCritically End.

EWExtinct in Wild

EXExtinct

🇰🇷 Class II endangered wildlife (Korea)

Geological Era

Extant

Diet

Omnivore

Length · Height

6.1cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

Slow-flowing areas rich in reeds and aquatic plants in the Han River system (parts of the Namhan River, Hoengseong, Yangpyeong, Gapyeong) and Muhan Stream in Chungcheongnam-do

💡 Everyday Comparisons for Size, Mass & Speed

💡 A body length of 6 cm is slightly longer than two Korean 500-won coins (about 2.65 cm in diameter each) placed side by side (Comparison).
💡 Freshwater mussels act as incubators that shelter the eggs and young (Comparison), so this fish must be protected together with the mussels it spawns in.

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.

#한강납줄개#Rhodeus pseudosericeus

📖 1. Overview

The Han River bitterling is a small bitterling found only around the Namhan River and some streams in Chungcheongnam-do, laying its eggs inside freshwater mussels.

🦴 2. Anatomy & Morphology

Its body is oval, laterally flattened, and deep, with a relatively long caudal peduncle. A blue longitudinal stripe runs from behind the middle of the body to the base of the caudal fin.

🔍 3. Ecology & Behavior

It is an omnivore that eats aquatic insects and attached algae. The female uses her ovipositor to lay eggs inside the gills of a freshwater mussel, and the young grow inside the mussel until they can swim.

🇰🇷 4. Connection to Korea

It is a Class II endangered wildlife (Korea) species and a Korean endemic found only in parts of the Namhan River in the Han River system and in Yesan and Boryeong in Chungcheongnam-do.