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

🧬 Biological Classification (Kingdom to Species)Gasterosteus aculeatus

Kingdom

Animalia

Phylum

Chordata

Class

Actinopteri

Order

Perciformes

Family

Gasterosteidae

Genus

Gasterosteus

Species

Gasterosteus aculeatus

Actinopteri🥩 Carnivore

Three-spined stickleback

Gasterosteus aculeatus (Three-spined stickleback · イトヨ)

🛡️ 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

11cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

Rivers, lakes, estuaries, and coastal seas of the Northern Hemisphere, in shallow areas rich in aquatic plants

💡 Everyday Comparisons for Size, Mass & Speed

💡 Its average length of 5 cm is similar to the length of two Korean 500-won coins (2.65 cm in diameter) placed side by side (Comparison).
💡 During the breeding season, males change in appearance as their body turns dark blue and their belly turns red (National List of Species of Korea).
💡 Because it is easy to raise and experiment with, it is a flagship laboratory animal used in evolutionary and environmental studies (Animal Diversity Web).

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.

#큰가시고기#Gasterosteus aculeatus

📖 1. Overview

The Three-spined stickleback is a small fish widely inhabiting rivers, lakes, estuaries, and coastal seas of the Northern Hemisphere. Its body shape varies greatly depending on its habitat.

🦴 2. Anatomy & Morphology

Its body is spindle-shaped and flattened from side to side, with three sharp spines in front of the dorsal fin and one spine each on the pelvic and anal fins. During the breeding season, males turn dark blue on the body and bright red on the belly.

🔍 3. Ecology & Behavior

It feeds on plankton and small invertebrates such as crustaceans and insect larvae. During the breeding season, the male digs into the bottom, builds a nest out of aquatic plants for females to lay eggs in, and guards it.

🇰🇷 4. Connection to Korea

According to the National List of Species of Korea, it lives in the Nakdonggang River and rivers along the East Sea coast, and spawns from March to May.