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🧬 Biological Classification (Kingdom to Species)Euphausia pacifica

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Euphausiacea

Family

Euphausiidae

Genus

Euphausia

Species

Euphausia pacifica

Malacostraca🌊 Marine predator / filter feeder

North Pacific krill

Euphausia pacifica (North Pacific krill · ツノナシオキアミ)

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

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

Geological Era

Extant

Diet

Marine predator / filter feeder

Length · Height

1.1~2.5cm · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

North Pacific (from the Bering Sea to about 40°N, including the East Sea); around 300 m deep during the day and near the surface at night

💡 Everyday Comparisons for Size, Mass & Speed

💡 A maximum adult body length of 25 mm is similar to the diameter of a Korean 100-won coin (about 24 mm) (Comparison).
💡 'Euphausiids of the World Ocean' on the Dutch Naturalis website notes that this species has been commercially fished in the East Sea and near Vancouver Island, Canada. It is a small shrimp-like crustacean that forms the base of the marine food chain for whales and seabirds.

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.

#태평양난바다곤쟁이#Euphausia pacifica

📖 1. Overview

The North Pacific krill is a species of krill living only in the North Pacific that forms large swarms and serves as an important food source for whales, fish, and seabirds.

🦴 2. Anatomy & Morphology

Its eyes are round and large, with an eye diameter about 0.21 times the carapace length. It lacks a rostrum (frontal horn), its short frontal plate forms a blunt triangle, and there is a pair of small denticles on either side of the carapace.

🔍 3. Ecology & Behavior

It makes strong vertical migrations, staying in deep water during the day (usually around 300 m deep, up to 1,000 m) and rising near the surface at night to feed. At night, within the upper 100 m, it filter-feeds on unicellular algae and other particles in the water, and is close to omnivorous in trophic level.

🇰🇷 4. Connection to Korea

It is listed under the name "Taepyeongyangnanbadagonjaengi" (Korean name) on the National List of Species of Korea, and is recorded as also inhabiting the East Sea.