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

🧬 Biological Classification (Kingdom to Species)Scaphechinus mirabilis

Kingdom

Animalia

Phylum

Echinodermata

Class

Echinoidea

Order

Echinolampadacea

Family

Scutellidae

Genus

Scaphechinus

Species

Scaphechinus mirabilis

Echinoidea❔ Diet unknown

Scaphechinus mirabilis

Scaphechinus mirabilis (Scaphechinus mirabilis · ハスノハカシパン)

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

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

Geological Era

Extant

Diet

No data

Length · Height

5.4~7.7cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

From the lower intertidal zone to a depth of 125 m (Korea, Japan, northern China, Kamchatka, and the Aleutian Islands)

💡 Everyday Comparisons for Size, Mass & Speed

💡 Its test size of 77 mm is slightly smaller than the long side of a credit card (about 86 mm), making it about the size of a single card (Comparison).
💡 It is a sea urchin recorded along Korean coasts including Jumunjin and Samcheok in Gangwon-do, Yeongilman in Pohang, and Busan (National List of Species of Korea domestic distribution).

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.

#연잎성게#Scaphechinus mirabilis

📖 1. Overview

Scaphechinus mirabilis is a flat, disc-shaped sea urchin (sand dollar) living in Korea, Japan, northern China, Kamchatka, and the Aleutian Islands.

🦴 2. Anatomy & Morphology

Its test is 54–77 mm long, with a rounded pentagonal or disc shape and similar length and width. The oral side is flat while the center of the aboral side rises slightly, and the petaloid pattern takes up nearly half the test length. When alive it is pale purple, and the test stripped of spines is white.

🔍 3. Ecology & Behavior

It lives on the bottom from the lower intertidal zone down to 125 m deep. Large tubercles densely cover the entire surface of the test and are especially abundant on the aboral side.