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🧬 Biological Classification (Kingdom to Species)Eptatretus stoutii

Kingdom

Animalia

Phylum

Chordata

Class

Myxini

Order

Myxiniformes

Family

Myxinidae

Genus

Eptatretus

Species

Eptatretus stoutii

Myxini🥩 Carnivore

Pacific hagfish

Eptatretus stoutii (Pacific hagfish · Pacific hagfish)

🛡️ Conservation Status (IUCN Red List)DD (Data Deficient)

DDData Deficient

LCLeast Concern

NTNear Threatened

VUVulnerable

ENEndangered

CRCritically End.

EWExtinct in Wild

EXExtinct

Geological Era

Extant

Diet

Carnivore

Length · Height

30.5~63.5cm · No data

Mass · Top Speed

0.8~1.4kg · No data

Habitat & Fossil Locality

Muddy bottoms along the eastern coast of the North Pacific, at depths of 16–633 m (mainly 40–100 m)

💡 Everyday Comparisons for Size, Mass & Speed

💡 Its body weight of 1.4 kg is similar to the weight of a single 1.5 L plastic bottle (Comparison).
💡 According to the U.S. Animal Diversity Web, about 5 million pounds (about 2,300 tons) of Pacific hagfish meat are consumed yearly in Korea, and in many parts of the world its skin is used for eelskin products such as wallets and shoes.
💡 It can be seen in public aquariums and is studied as a research subject because of its very slow metabolism (Animal Diversity Web, FishBase).

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)35

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

#태평양먹장어#Eptatretus stoutii

📖 1. Overview

The Pacific hagfish is a hagfish living on the eastern Pacific sea floor from southeastern Alaska to Baja California in Mexico. It is famous for producing slime and tying its own body into knots.

🦴 2. Anatomy & Morphology

Its body is long, cylindrical, and pinkish gray. Instead of jaws, it has two pairs of tooth-like rough rasps on its tongue; its eyes are small and degenerate, and it senses smell and touch with short tentacles around its mouth. Slime glands are lined up along the sides of its body.

🔍 3. Ecology & Behavior

It feeds on dead or dying fishes, mammals, and marine invertebrates, tying its body into a knot to gain leverage for tearing off flesh. When its slime touches seawater, it instantly turns into a sticky gel that can suffocate attackers. It lays 20–30 eggs at a time.