Here are 7 Interesting Facts about Muroaji Fish that are Rarely Known

By. Amma - 22 Apr 2025

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lautnusantara.com Muroaji fish is a common name for several species of fish from the genus Decapterus, especially those popular in Indonesia and Japan. In Indonesia, this fish is also known as blue scad or single fish. In English, several species of Decapterus are called mackerel scad or round scad.
In Japan, the name Muroaji is very common, even used in international trade as fishing bait.

Interesting facts about muroaji fish (Decapterus spp.) that are rarely known:

  1. Various names: This fish is known by various names in various regions. In Indonesia itself, besides muroaji, it is also often referred to as blue scad or single fish. In Japan, it is known as "Muroaji," and this name is even used in international trade for this type of fish as fishing bait, especially for tuna.
  2. Vertical migration: Although often found near the surface, muroaji fish also make quite significant vertical migrations. They can be found up to a depth of 400 meters, and generally spend time at depths of 40 to 200 meters.
  3. As valuable bait: Muroaji fish has a fairly high economic value as live or frozen bait to catch large pelagic fish such as tuna and skipjack. This causes this fish to often be exported to countries such as Japan.
  4. Similarity to mackerel: In English, muroaji fish (especially Decapterus macarellus) is known as "mackerel scad" because of the similarity of its body shape to mackerel.
  5. Global distribution: Muroaji fish have a very wide distribution in tropical and subtropical waters throughout the world, including in the Atlantic, Pacific, and Indian Oceans. They like clear waters and are often found around islands.
  6. Including small pelagic fish: Muroaji fish are an important component of small pelagic fish resources, which are often the target of traditional fishermen using boat lift nets, for example in the waters of Doreri Bay, West Papua.
  7. Rich in nutrition: Like mackerel in general, muroaji is also a good source of animal protein, contains omega-3 fatty acids which are beneficial for heart and brain health, as well as various other important vitamins and minerals.

Types of Muroaji Fish:
Some species included in the muroaji fish group (genus Decapterus) include:

  • Decapterus macarellus (Blue Kite / Mackerel Scad)
  • Decapterus akaadsi
  • Decapterus macrosoma
  • Decapterus maruadsi (Round Scad)

 

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