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

🧬 Biological Classification (Kingdom to Species)Marphysa sanguinea

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Eunicida

Family

Eunicidae

Genus

Marphysa

Species

Marphysa sanguinea

Polychaeta🍂 Omnivore

Rock worm

Marphysa sanguinea (Rock worm · Rock worm)

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

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

Geological Era

Extant

Diet

Omnivore

Length · Height

25~32cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

Burrows in soft tidal flats, mixed bottoms, coral reefs, and seagrass beds in warm seas (depths of 1–65 m)

💡 Everyday Comparisons for Size, Mass & Speed

💡 Its maximum body length of 32 cm is slightly longer than the long side of an A4 sheet of paper (29.7 cm) (Comparison).
💡 It is used as fishing bait and has been recorded along many coasts in Korea, including Pohang, Geoje, and Gunsan (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.

#바위털갯지렁이#Marphysa sanguinea

📖 1. Overview

The rock worm is a polychaete worm distributed worldwide in warm seas and used as fishing bait in Korea.

🦴 2. Anatomy & Morphology

Its body is 250–320 mm long and 8–10 mm wide, with a reddish-brown color. The front segments are cylindrical and become flatter toward the rear, while the prostomium and front body gleam with iridescence and have well-developed eyes. It has a jawed pharynx.

🔍 3. Ecology & Behavior

It lives in burrows in soft tidal flats, mixed bottoms, coral reefs, and seagrass beds. It is an omnivore that eats both plant and animal matter, moving around to forage.

🇰🇷 4. Connection to Korea

It is listed on the National List of Species of Korea and has been recorded in Pohang, Daebo, Guryongpo, Bangeojin, Geojeman, Dolsando, Geomundo, Gunsan, and Garorimman.