Cutlass Fish

What is cutlass fish?

A cutlass fish is any of several marine species of fishes belonging to the family Trichiuridae within the order Perciformes. It is important to distinguish this fish from the cuttlefish, which is a marine cephalopod mollusk rather than a fish.¹²³

Cutlass fishes are found in the Atlantic, Pacific, and Indian oceans. They are characterized by a long, eel-like body and a low dorsal fin that runs the length of their back. They possess enlarged mouths with sharp, pointed teeth and are carnivorous, feeding primarily on other fish. Their tails are greatly reduced in size, appearing either forked or tapering to a point depending on the form. One notable species, Trichiurus lepturus, can reach a maximum length of 1.5 metres (5 feet). The family as a whole consists of approximately 45 species across 10 genera.¹

How does the cutlassfish use its sharp teeth to hunt?

While it is known that the cutlass fish is a carnivorous predator that feeds primarily on other fishes and possesses an enlarged mouth with sharp, pointed teeth, the provided search results do not contain specific details regarding the precise mechanics or behavioral strategies the fish uses to hunt with those teeth.¹

We could dive deeper into the general hunting behaviors of other Perciformes or explore the biology of different predatory marine species if you are interested.

What are the main differences between a cutlassfish and a cuttlefish?

The primary difference between a cutlassfish and a cuttlefish is their biological classification: the cutlassfish is a fish, while the cuttlefish is a cephalopod mollusk related to the octopus and squid.¹³

The following table highlights their key differences:

Feature

Cutlassfish

Cuttlefish

Classification

Fish (Family Trichiuridae)

¹

Cephalopod (Order Sepioidea)

³

Body Shape

Long, eel-like body

¹

Flattened body with narrow fins

³

Key Anatomy

Enlarged mouth with sharp, pointed teeth

¹

Eight arms and two long, retractable tentacles

³

Internal Structure

Typical fish skeleton

¹

Thick, internal calcified shell (

cuttlebone

)

³

Diet

Carnivorous, feeding on other fish

¹

Crustaceans, small fish, and other cuttlefish

³

While cutlassfish are known for their distinctive, elongated appearance and predatory nature in marine environments, cuttlefish are noted for their intelligence, ability to use tentacles to capture prey, and the presence of a cuttlebone, which is often used by humans as a calcium supplement for birds.¹³

In which ocean regions are cutlassfish most commonly found?

Cutlassfish are exclusively marine fishes belonging to the family Trichiuridae. They are widely distributed, with representatives found across the Atlantic Ocean, Pacific Ocean, and Indian Ocean.¹

These fish are typically associated with warm, deep-sea environments. The family includes approximately 45 species across 10 genera, all of which share a characteristic elongated, eel-like body shape.⁷⁸¹