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

🧬 Biological Classification (Kingdom to Species)Oplegnathus fasciatus

Kingdom

Animalia

Phylum

Chordata

Class

Actinopteri

Order

Centrarchiformes

Family

Oplegnathidae

Genus

Oplegnathus

Species

Oplegnathus fasciatus

Actinopteri🥩 Carnivore

Barred knifejaw

Oplegnathus fasciatus (Barred knifejaw · イシダイ)

🛡️ Conservation Status (IUCN Red List)LC (Least Concern)

DDData Deficient

LCLeast Concern

NTNear Threatened

VUVulnerable

ENEndangered

CRCritically End.

EWExtinct in Wild

EXExtinct

Geological Era

Extant

Diet

Carnivore

Length · Height

80cm · No data

Mass · Top Speed

6.4kg · No data

Habitat & Fossil Locality

Coastal rocky areas and reefs, at depths of 1–10 m

💡 Everyday Comparisons for Size, Mass & Speed

💡 Its maximum weight of 6.4 kg is similar to a bowling ball (about 6.4 kg, 14-pound class) (Comparison).
💡 It is a target of commercial fisheries, aquaculture, and recreational angling (FishBase).
💡 In Korea, it can be seen in all sea areas (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.

📊 Mass & Speed Index (0–100)

⚖️ Mass Index (Blue Whale ~190 t = 100, log scale)46

Site-computed relative index from recorded values; not a formal scientific metric.

#돌돔#Oplegnathus fasciatus

📖 1. Overview

The barred knifejaw is a fish of the family Oplegnathidae living in rocky coastal areas, with distinct vertical bars on its body when young. The IUCN (2024) assessed it as Least Concern (LC).

🦴 2. Anatomy & Morphology

Its body is a laterally compressed, elongated oval with 6–7 black vertical bars over a bright grayish-black background. When fully grown, the bars gradually fade, remaining only at the tip of the snout and the caudal peduncle.

🔍 3. Ecology & Behavior

It feeds mainly on hard-shelled invertebrates such as bivalves and sea urchins. Its spawning season is April–July, and juveniles stay associated with drifting seaweed.