Platybelone platyura
Silvery surface-dweller most often logged in Hawaii's shallows, 26-29C, present year-round on reef flats and shorelines.
A long, thin, pencil-shaped fish that cruises just under the surface, usually seen as a flash of silver rather than a clear view. Both jaws are drawn into a slender beak lined with fine teeth, and the body stays needle-straight with a single dorsal fin set well back toward the tail. At around 31 cm it is small for a needlefish, and it rarely dives deeper than a metre or two, so you will spot it looking up rather than down.
Look for it skimming just under the surface in the top couple of metres, often in loose groups over shallow reef flats and sandy shorelines. It tends to hold position or dart forward in short bursts when hunting small fish and rarely pays divers much attention unless approached quickly. Most sightings happen in bright, calm shallows where the surface glare makes it easy to overlook until it flashes past.
Like other needlefish it hunts by sight near the surface, snapping up small fish and larvae with a quick sideways strike of its beak rather than chasing prey down.
Sightings show no clear seasonal pattern, and with a comfortable range of 26.3 to 29.0C it stays active on warm shallow reefs all year round.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
Most reliably logged in Hawaii, where it turns up across a wide spread of shoreline and reef-flat sites, making it the strongest bet by far for this species. A smaller number of sightings come from the Central Atolls of the Maldives, so it is worth watching the shallows there too.
Mapping where Keeled Needlefish is logged…
Hawaii is by far the most reliable place to see them, logged across a wide range of shoreline and reef-flat sites. Smaller numbers show up in the Central Atolls of the Maldives.
There is no strong season in the sighting data, so they are considered a year-round find on warm shallow reefs in the 26 to 29C range.
Look for a slender silver fish just under the surface with a long thin beak-like jaw and a dorsal fin set far back near the tail. It swims in a straight, rigid line rather than an undulating one, usually in the shallowest metre or two of water.
They typically reach around 31 cm, making them one of the smaller needlefish divers encounter on shallow reefs.
No, they are not considered dangerous to divers and typically move away from swimmers rather than approach.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Ocean Sunfish
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