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

🧬 Biological Classification (Kingdom to Species)Orisarma intermedium

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Sesarmidae

Genus

Orisarma

Species

Orisarma intermedium

Malacostraca🍂 Omnivore

Red flower crab

Orisarma intermedium (Red flower crab · ベンケイガニ)

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

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

Geological Era

Extant

Diet

Omnivore

Length · Height

3.5cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

Stone walls, banks, and grasslands along the lower reaches of small streams flowing into the sea

💡 Everyday Comparisons for Size, Mass & Speed

💡 A carapace width of about 3.5 cm is nearly 1 cm wider than the diameter of a Korean 500-won coin (about 2.65 cm) (Comparison).
💡 The National Institute of Ecology notes that this crab is easily confused with Doduk-ge (a Korean crab name) because of its similar habitat, carapace shape, and claw color. Even if you see a red-clawed crab on stone walls or grass along a lower stream, it may be a protected species that should not be caught.

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.

#붉은발말똥게#Orisarma intermedium

📖 1. Overview

The red flower crab is a medium-sized crab living in the lower reaches of streams along the southwestern coast and Jeju Island, and is designated as a Class II endangered wildlife species in Korea.

🦴 2. Anatomy & Morphology

Its carapace is about 3 cm long and about 3.5 cm wide, convex on top with distinct grooves dividing its regions. The claws and frontal area are bright red with very pale yellowish-white tips, and some individuals are red all over.

🔍 3. Ecology & Behavior

It is omnivorous, eating insects, dead fish, and fallen leaves. It mates in May–June, egg-bearing females are seen in June–July, and it comes down to shallow sea waters only during the spawning season. Habitat damage from estuary development is its main threat.

🇰🇷 4. Connection to Korea

The National Institute of Ecology introduces this species as a Class II endangered wildlife species (Korea), distributed along the southwestern coast in Incheon, Chungcheongnam-do, Gyeongsangnam-do, and Jeollanam-do as well as Jeju Island.