Fauna
Fish

Pacific Chub Mackerel

Scomber japonicus

Also known as Chub Mackerel, Pacific Mackerel, Greenback Mackerel

Pacific chub mackerel form dense, coordinated schools that constantly cruise coastal and offshore waters in search of plankton and small schooling fish. These torpedo-shaped swimmers rely on continuous motion to ventilate their gills and maintain buoyancy. Serving as a foundational forage fish, they sustain marine food webs across the Pacific and Indian oceans while supporting massive commercial purse-seine fisheries.

SchoolingMarineFast Swimmer
Pacific Chub Mackerel reference1 / 2
(c) Dragan Maksimovic, some rights reserved (CC BY-SA) · cc-by-sa
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyNorthern Anchovy, Pacific Sardine, Pelagic Copepods
Predators
  • California Sea Lion
  • Yellowfin Tuna
  • Common Dolphin
ThreatsOverfishing, changing ocean temperatures, and industrial bycatch
HabitatsPelagic coastal and open ocean waters from surface down to 300 meters
Life span8–18 years
Classification
  1. OrderPerciformes
  2. FamilyScombridae
  3. GenusScomber
  4. SpeciesScomber japonicus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Snorkeling Encounters: Watch for tight, shimmering bait balls over coastal reefs and drop-offs.
  • Angling Release: Use barbless hooks and handle gently with wet hands to protect their delicate skin.
  • Seabird Indicators: Look for diving terns and pelicans, which frequently reveal feeding schools below.
Related species
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