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

🧬 Biological Classification (Kingdom to Species)Tegillarca granosa

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Arcida

Family

Arcidae

Genus

Tegillarca

Species

Tegillarca granosa

Bivalvia🌊 Marine predator / filter feeder

Blood cockle

Tegillarca granosa (Blood cockle · ハイガイ)

🛡️ Conservation Status (IUCN Red List)NE (Not Evaluated)

Not Evaluated (NE) on the IUCN Red List yet.

Geological Era

Extant

Diet

Marine predator / filter feeder

Length · Height

9cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

Muddy bottoms from the lower intertidal zone to depths of 10–20 m, in bays, estuaries, and mangroves

💡 Everyday Comparisons for Size, Mass & Speed

💡 Its common shell length of 6 cm is slightly longer than two Korean 500-won coins (diameter about 2.65 cm) placed side by side (Comparison).
💡 It is a representative farmed bivalve raised by bottom seeding around Beolgyo in Jeollanam-do (National List of Species of Korea).
💡 It appears as a delicacy in Jasaneobo and has been known since olden times as a local specialty of Jeolla-do (National List of Species of Korea).

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.

#꼬막#Tegillarca granosa

📖 1. Overview

The blood cockle is a bivalve that burrows shallowly into tidal flat mud in warm, shallow seas and is widely distributed across the Indo-Pacific.

🦴 2. Anatomy & Morphology

Its shell has 17–18 radial ribs (vertical ridges) bearing small nodules. It is distinguished from Saekkomak (a Korean animal name), which has 30–34 radial ribs.

🔍 3. Ecology & Behavior

It filter-feeds on organic detritus and phytoplankton and often forms dense beds. Sexes are separate, spawning occurs mainly in July–August, and its maximum recorded lifespan is 12 years.

🇰🇷 4. Connection to Korea

It is listed on the National List of Species of Korea under the name Kkomak (Korean name) and lives along the south and west coasts. It is farmed mainly along the south coast of Jeollanam-do, especially around Beolgyo, and is also introduced as a delicacy in Jasaneobo.