One-stripe spiny eel
Small spiny eel from South Asian fresh and brackish waters
The one-stripe spiny eel is a small fish native to rivers and deltas across South Asia. It inhabits both fresh and brackish environments, often hiding in vegetation or muddy substrates. This species reaches up to 63.5 cm and plays a role in local aquatic ecosystems.
- Reaches a maximum length of 63.5 cm
- Found in fresh and brackish waters
- Eggs are attached to algal masses
- Common in rice paddies and muddy streams
- Sri Lankan population is a separate species
What it is
The one-stripe spiny eel is a slender fish belonging to the family Mastacembelidae. It grows to a maximum length of 63.5 cm. Its body is adapted for life in slow-moving or stagnant waters. The fish prefers environments with dense vegetation and soft, silty, or muddy bottoms. It is found in both freshwater and brackish conditions, making it versatile within its range.
Where it lives
This species is distributed across Pakistan, India, Bangladesh, Nepal, and Myanmar. It inhabits a variety of water bodies, including running rivers and stagnant ponds. The fish is common in river deltas and slow-moving streams. It also appears frequently in rice paddies. The substrate in these habitats is typically mud or silt, often covered with aquatic plants that provide cover.
How it lives
The one-stripe spiny eel thrives in waters with abundant vegetation. It uses these plants and the muddy substrate for concealment. While specific dietary habits are not detailed here, its presence in rice fields and ponds suggests it forages among plant roots and sediment. The fish is adapted to both flowing and still water conditions.
Breeding and life cycle
Reproduction involves the deposition of eggs onto algal masses. After mating, the adults attach their eggs to these clusters of algae. This method likely provides protection and oxygenation for the developing embryos.
Fish and people
The one-stripe spiny eel is part of the aquatic biodiversity in several South Asian countries. It is commonly found in agricultural areas such as rice paddies. It remains a wild species within its natural habitat.
Status and threats
However, taxonomic clarification has occurred regarding this group. In 2008, researchers identified that the population previously thought to be Macrognathus aral in Sri Lanka was actually a distinct species, Macrognathus pentophthalmos. This highlights the importance of accurate identification for conservation efforts.
Questions people ask about One-stripe spiny eel
Where does the one-stripe spiny eel live?
It is found in Pakistan, India, Bangladesh, Nepal, and Myanmar. It lives in fresh and brackish rivers, deltas, ponds, and rice paddies with muddy substrates.
How large does this fish grow?
Individuals of this species can reach a maximum length of 63.5 cm, which is approximately 25 inches.
How does this species reproduce?
After mating, the fish deposit their eggs by attaching them to algal masses. This provides a secure environment for the eggs to develop.
Good reading and sources
- Macrognathus aral on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Macrognathus aral", 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.
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