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🧬 Biological Classification (Kingdom to Species)Tanakia somjinensis

Kingdom

Animalia

Phylum

Chordata

Class

Actinopteri

Order

Cypriniformes

Family

Cyprinidae

Genus

Tanakia

Species

Tanakia somjinensis

Actinopteri❔ Diet unknown

Seomjin bitterling

Tanakia somjinensis (Seomjin bitterling · Seomjin bitterling)

🛡️ Conservation Status (IUCN Red List)EN (Endangered)

DDData Deficient

LCLeast Concern

NTNear Threatened

VUVulnerable

ENEndangered

CRCritically End.

EWExtinct in Wild

EXExtinct

🇰🇷 Class I endangered wildlife (Korea)

Geological Era

Extant

Diet

No data

Length · Height

5~6cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

Muddy bottoms less than 1 m deep in lowland reaches of the Seomjin River with slow currents and abundant aquatic plants

💡 Everyday Comparisons for Size, Mass & Speed

💡 A body length of 5–6 cm is about the length of two Korean 500-won coins (about 2.65 cm in diameter each) placed side by side (Comparison).
💡 "Imsil" in its Korean name comes from Imsil-gun, Jeollabuk-do, the only place where it was confirmed when first described as a new species, and is a place name that can be found on a map.

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.

#임실납자루#Tanakia somjinensis

📖 1. Overview

The Seomjin bitterling is a small bitterling found only in the Seomjin River, named after Imsil-gun in Jeollabuk-do where it was first discovered.

🦴 2. Anatomy & Morphology

Its body is laterally flattened and moderately deep, with one pair of barbels around the mouth. During the spawning season, the female's ovipositor lengthens until it reaches the caudal fin.

🔍 3. Ecology & Behavior

It uses its ovipositor to lay eggs inside freshwater mussels during its May–June spawning season. Its egg count is small at 10–30 eggs.

🇰🇷 4. Connection to Korea

It is a Class I endangered wildlife (Korea) species and a Korean endemic with a restricted range in the Seomjin River. Around Imsil-gun, where it was first discovered, it is believed to be on the verge of local extinction.