News
SpeciesScientists Discover Mysterious New Fish in the Red Sea – and Have Never Seen It AgainOceanEye to eye with Britain's hidden sharks at SharkAdemy - OceanographicRiversIn October, biologists surveying a New York harbor for invasive fish pulled up a bright yellow one. It wasn't an invasive species at allOceanShedd Aquarium Sends Shark Eggs to Bolster Wild PopulationsSpeciesA rare fish has been found in Lake Ontario, North America, whose entire body is golden. It is a nati..OceanThe Great Sea Reef Is Fiji’s Wildest Dive, and a New Frontier for ConservationOceanEckerd College professor contributes to designating Biscayne Bay an Important Shark and Ray AreaSpeciesRio Verde Grande Survey Identifies Fifty-Three Fish Species Facing Flow ReductionsFisheriesAdams River Salmon Run in Thompson-NicolaIndiaHilsa production dropped 26% in five years, fisheries minister tells parliamentSpeciesScientists Discover Mysterious New Fish in the Red Sea – and Have Never Seen It AgainOceanEye to eye with Britain's hidden sharks at SharkAdemy - OceanographicRiversIn October, biologists surveying a New York harbor for invasive fish pulled up a bright yellow one. It wasn't an invasive species at allOceanShedd Aquarium Sends Shark Eggs to Bolster Wild PopulationsSpeciesA rare fish has been found in Lake Ontario, North America, whose entire body is golden. It is a nati..OceanThe Great Sea Reef Is Fiji’s Wildest Dive, and a New Frontier for ConservationOceanEckerd College professor contributes to designating Biscayne Bay an Important Shark and Ray AreaSpeciesRio Verde Grande Survey Identifies Fifty-Three Fish Species Facing Flow ReductionsFisheriesAdams River Salmon Run in Thompson-NicolaIndiaHilsa production dropped 26% in five years, fisheries minister tells parliament
EveryFish
Lepturacanthus savala, Savalai hairtail

Savalai hairtail

A deep-water cutlassfish found in the Indian and west Pacific oceans.

Photo: Gihan Jayaweera, CC BY-SA 3.0, via Wikimedia Commons

The Savalai hairtail is a deep-water cutlassfish native to the Indian Ocean and the western Pacific Ocean. This species grows up to a metre long and rises to the surface at night to hunt small fish and prawns.

Share on WhatsApp

  • Reaches a maximum length of one metre and weighs up to eleven kilograms.
  • Lives in deep ocean waters at depths of one hundred metres or more.
  • Rises to the ocean surface at night to hunt for food.
  • Feeds mainly on small fish and crustaceans, particularly prawns.

What it is

The Savalai hairtail is a type of cutlassfish, which is a group of predatory marine fish known for their elongated, blade-like bodies. This specific species reaches a maximum length of one metre and can weigh up to eleven kilograms. It is a deep-water fish, typically living at depths of one hundred metres or more. Its body is adapted for life in the open ocean, allowing it to swim efficiently through the water column while hunting for prey.

Where it lives

This species is native to the Indian Ocean and extends its range into the western Pacific Ocean. Its distribution reaches as far east as the coastal waters of Australia. As a deep-water inhabitant, it prefers to live far below the surface, typically residing at depths starting from one hundred metres. This deep pelagic environment provides the specific conditions it needs to thrive away from shallow coastal habitats.

How it lives

The Savalai hairtail exhibits a distinct nocturnal hunting pattern. During the night, it leaves its deep-water habitat and rises to the surface of the ocean to feed. Its diet consists primarily of small fish and various crustaceans. Prawns form a particularly important part of its nightly meals. By moving to the surface in the dark, it takes advantage of the cover of night to catch its prey before returning to deeper waters.

Savalai hairtail
A drawing made by EveryFish from what this page says. It is a diagram, not a picture of the real fish.

Questions people ask about Savalai hairtail

Where does the Savalai hairtail live?

It is native to the Indian Ocean and the western Pacific Ocean, reaching as far east as Australia. It lives in deep waters at depths of one hundred metres or more.

What does the Savalai hairtail eat?

It feeds on small fish and crustaceans. Prawns are a major part of its diet. It hunts for this food by rising to the surface of the water at night.

How large does the Savalai hairtail grow?

This species can grow to a maximum length of one hundred centimetres, which is about thirty-nine inches. It can also reach a maximum weight of eleven kilograms, or roughly twenty-four pounds.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Lepturacanthus savala", 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.

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

The weekly digest

Every Monday: the fish of the day, new pages on EveryFish, and the conferences and anniversaries of the week ahead.