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What is a Ribbonfish?

Heather Phillips
Heather Phillips

Ribbonfish are fish with elongated, narrow bodies that live in the pelagic zone of marine waters. This means that they generally live in the open sea, not in the shallower coastal waters. Their typical habitat is at depths between approximately 330 ft (100 m) and 1,640 ft (500 m).

For biological classification, ribbonfish belong to the order lampriformes, under the suborder taeniosomi and in the family trachipteridae. Within the family, there are three genera and ten species. The ribbonfish genera are zu, desmodema, and trachipterus.

Ribbonfish feed on squid.
Ribbonfish feed on squid.

Ribbonfish are seldom seen because of the depths they inhabit. When they are observed, however, they are easily recognizable. Their slender, stretched-out bodies have a long dorsal fin, which typically runs down the whole length of the back, from just behind the head. They can have between 62 and 111 vertebrae. Anal fins are not present, and their pectoral fins are small. They also do not have scales.

Ribbonfish tend to prefer open waters.
Ribbonfish tend to prefer open waters.

Since they live in deeper waters, the fins and membranes of these fish are delicate and brittle. They move in a serpentine way, relying on their bodies’ undulations and their dorsal fins to propel them through the water. They are not bottom-feeders, and their diet consists mainly of fish, squid, and small invertebrates. An interesting characteristic they possess is that their jaws can significantly protrude when they are eating. They also grow in an allometric fashion, with different body parts growing at greatly varying rates.

Their habitat includes all the world’s oceans except the Antarctic. They also can be found in the Mediterranean Sea. Some places where ribbonfish have been caught include the Atlantic Ocean — near Iceland, Scotland, the Orkney Islands, and Scandinavia — as well as the Bay of Bengal, Puget Sound, and off of the coast of Mauritius. They can vary in length from 12 in (30.48 cm) to 56 ft (17.07 m).

One species of ribbonfish, trachipterus ishikawae, is also known as the earthquake fish by the Taiwanese people. This is because it tends to appear along the coast of Taiwan after a sizeable earthquake occurs. This has been documented in the years 2006, 2007, and 2010. Sightings of the fish have also occurred in the same area, however, when no seismic activity was recorded.

Another species of this pelagic fish is the trachipterus altivelis. Its common name is king-of-the-salmon, and it can be found in the waters of the Puget Sound. A Native American legend states that this ribbonfish leads the salmon when they migrate.Frequently Asked Questions

What is a ribbonfish and where can it be found?

Ribbonfish, also known as cutlassfish, are a group of predatory, elongated fish found in deep waters across the world, including the Atlantic, Pacific, and Indian Oceans. They inhabit depths of 200 to 900 meters, often near the ocean floor, and are known for their shiny, ribbon-like appearance.

How large can ribbonfish grow?

Ribbonfish can reach impressive sizes, with some species growing up to 8 feet in length. Their slender, compressed bodies contribute to their unique, ribbon-like shape. Despite their length, they are not heavy, with most weighing less than 10 pounds, allowing them to navigate the deep-sea currents with ease.

What do ribbonfish eat?

Ribbonfish are carnivorous and have a diet consisting mainly of smaller fish, crustaceans, and cephalopods. They are adept hunters, using their long bodies and sharp teeth to snatch prey. Their feeding habits play a significant role in the deep-sea food chain, controlling populations of their prey species.

Are ribbonfish the same as oarfish?

No, ribbonfish and oarfish are different species. While both have elongated bodies, oarfish are much larger, reaching lengths of up to 36 feet, and they typically dwell in deeper parts of the ocean. Ribbonfish have a more compressed body and are found at shallower depths compared to the elusive oarfish.

Can ribbonfish be eaten by humans?

Yes, ribbonfish are edible and are consumed in various parts of the world, particularly in Asia. They are often dried or salted and can be found in markets as a food source. However, they are not as widely known or consumed as other commercial fish species.

What is the conservation status of ribbonfish?

The conservation status of ribbonfish varies by species, but most are not currently considered endangered. Due to their deep-sea habitat, they are less affected by fishing pressures than many other fish species. However, like all marine life, they could be impacted by changes in oceanic environments and overfishing in certain regions.

Discussion Comments

Eviemae

Although I am thirty something lady with two young children and a life full of plenty to do, I still harbor a secret dream that even my husband is unaware of.

I have the most heartfelt wish to learn how to dive in open waters out at sea. I suppose this stems from an early love of reading, and about a million books all about marine life.

I was enthralled with creatures of the open sea, like ribbonfish. Wouldn’t it be wonderful to see one up close and personal? Maybe to have it swim around you or by you so you could see it in detail.

Honestly, I’m not even sure if ribbonfish are close enough to the surface for a diver to see, but I would really love to have the chance someday!

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    • Ribbonfish feed on squid.
      Ribbonfish feed on squid.
    • Ribbonfish tend to prefer open waters.
      By: shime
      Ribbonfish tend to prefer open waters.