Fish
Striped Marlin
Kajikia audax · also called striped marlins
A group of striped marlin closes in on a school of smaller fish together, pale vertical stripes flashing brighter as the coordinated attack accelerates, each fish using bursts of some of the fastest swimming speed ever recorded in any fish to isolate and strike individual prey with a spear-like bill.
Overview
The striped marlin, Kajikia audax, is a fast, group-hunting billfish found in temperate and tropical waters across the Pacific and Indian Oceans. Exceptional burst speed supports both its coordinated hunting tactics and its reputation as a formidable sport fish.
Speed with a social side
Beyond raw speed, the striped marlin’s documented group hunting behaviour sets it apart from most large predatory fish, a level of cooperation that turns individual speed into a genuinely more effective collective hunting strategy.
Status
Near Threatened — under pressure from commercial and recreational fishing in parts of the Pacific and Indian Oceans, with regional management measures in place in some areas.
Striped Marlin: common questions
How fast can a striped marlin actually swim?
The striped marlin has been recorded reaching some of the fastest burst swimming speeds documented in any fish, an exceptional ability that supports both its coordinated hunting strategy against schooling prey and its renowned reputation for a powerful, fast-moving fight once hooked by recreational anglers.
Do striped marlin really hunt together in groups?
Yes, striped marlin have been observed hunting in coordinated groups, working together to herd and break apart schools of smaller prey fish, a level of cooperative hunting behaviour that is genuinely unusual among large predatory fish and helps make individual prey easier to isolate and capture.
Why do a striped marlin's stripes get brighter sometimes?
A striped marlin's pale vertical stripes can become notably brighter and more visible when the fish is excited, such as during an active group feeding attack or while fighting after being hooked, a visible physiological response that researchers believe may also play a role in coordinating group hunting behaviour among nearby individuals.
Where is the striped marlin typically found?
The striped marlin is native to temperate and tropical waters across the Pacific and Indian Oceans, generally found well offshore in open water, making it a species primarily encountered by anglers and researchers operating some distance from the immediate coastline.