Blue mackerel
A small, fast pelagic fish found in tropical Indo-Pacific waters.
The blue mackerel is a schooling fish in the Scombridae family, native to the Indian and Pacific Oceans. It supports commercial fisheries and serves as bait, while also being consumed by humans in various culinary forms.
- Grows up to 50 cm and weighs 1.4 kg
- Found in tropical Indo-Pacific waters
- Used as meat binder in food products
- Spawns offshore in depths of 100–125 m
- Often mistaken for chub mackerel
What it is
The blue mackerel is a member of the Scombridae family, sharing traits with tuna such as a round body that tapers toward the tail. Adults typically reach 30 cm in fork length, though they can grow to 44 cm and weigh up to 1.4 kg. Maximum recorded length is 50 cm. This species was once considered a subspecies of the chub mackerel but is now distinguished by genetic differences and physical features like a longer anal spine and specific dorsal fin spine counts. Its flesh is soft, making it easy to fillet but challenging to debone without damage.
Where it lives
This fish inhabits tropical to subtropical zones across the Indian and Pacific Oceans. Populations exist in the Red Sea, western Arabian Sea, Northwest Pacific near Japan, China, and Taiwan, and the Southwest Pacific around Australia and New Zealand. It also occurs in the eastern Pacific near Hawaii and the Revillagigedo Islands off Mexico. Blue mackerel live in surface waters but can be found at depths of up to 300 metres. They thrive in these varied marine environments, moving with currents that influence their distribution.
How it lives
Blue mackerel are voracious carnivores with diurnal habits, meaning they are active during the day. Their diet includes microscopic plankton, krill, anchovies, and other small pelagic fish. They are known for indiscriminate feeding behaviour, often striking at non-food items like cigarette butts or bare hooks when in a frenzy. To support this lifestyle, they have evolved large eyes with retinas sensitive to light. They form schools and are flighty, making them difficult to catch in harbours and estuaries.
Breeding and life cycle
Spawning timing varies by location. In the East China Sea, reproduction occurs between February and May when water temperatures are optimal. Off New South Wales, most spawning takes place 10 km offshore in depths of 100 to 125 metres. The East Australian Current transports eggs and larvae away from these grounds, which broadens their range but reduces survival probability for those carried too far. Fish over 31 cm are considered mature. Age is determined by counting marks on otoliths, with most individuals being one to three years old.
Fish and people
Fishers target blue mackerel for both commercial markets and private use. They serve as food for humans, often smoked, grilled, or broiled, and are also used as bait for tuna and other predatory fish. In pet food production, they are common ingredients. Industrially, freeze-dried blue mackerel protein acts as a meat binder in other products, helping to lower costs while enhancing texture and flavour. Care is required when processing due to their soft flesh and numerous bones. In Japan, it is called goma-saba, and in New Zealand, tawatawa.
Questions people ask about Blue mackerel
How big do blue mackerel get?
They typically reach 30 cm in length but can grow up to 50 cm. The maximum recorded weight is 1.4 kg. Most fish caught are between one and three years old.
Where are blue mackerel found?
They live in tropical and subtropical waters of the Indian and Pacific Oceans. Specific populations exist near Japan, Australia, New Zealand, Hawaii, Mexico, and the Red Sea.
What do blue mackerel eat?
They are carnivores that feed on plankton, krill, anchovies, and smaller pelagic fish. They are known to strike at almost anything, including non-food items, when feeding in schools.
Are blue mackerel good to eat?
Yes, they are consumed by humans smoked, grilled, or broiled. They are also used in pet food and as protein binders in processed meat products due to their flavour and texture.
Good reading and sources
- Blue mackerel on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Blue mackerel", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
Like Blue mackerel
All tunas and mackerels
WorldAtlantic bonito
A mackerel-like game fish of the Atlantic and Mediterranean.Tuna · Coasts and shelves
🇺🇸 United States and 3 morePacific bonito
Striped marine fish of the Pacific coastTuna · Coasts and shelves
🇿🇦 South Africa and 4 moreSnoek
A long, thin snake mackerel found in the Southern Hemisphere seas.Tuna · Coasts and shelves · 1791
WorldLittle tunny
A fast, coastal tuna of the Atlantic and Mediterranean.Tuna · Coasts and shelves · 1810
More from Scombridae
All of them
WorldLongtail tuna
A slender tropical tuna of the Indo-West Pacific.Tuna · Coasts and shelves
WorldBullet tuna
Small, slender tuna found in tropical oceans worldwide.Tuna · Open ocean