Sargocentron tiere
Red-and-white striped reef fish spotted in the Tuamotu Islands and Hawaii, hiding in caves in warm 25-29C water year-round.
Look for a slender, torpedo-shaped fish around 23 cm long with alternating reddish-brown and white horizontal stripes running the length of its body. Its eyes are notably large and reflective, an adaptation for the low light of the caves and overhangs it favours, and its fins carry a faint orange-red wash. Spiny gill-cover edges and an upturned snout help separate it from smoother-bodied reef fish sharing the same crevices.
Expect to find it tucked into reef crevices, under ledges, or inside small caves during the day, often facing outward and holding still as divers pass. It becomes more active around dusk and at night, when it moves out to feed over the reef, so night dives and late afternoon dives around the same ledges improve your odds. It is not shy so much as reclusive, relying on shadow and cover rather than fleeing.
Those oversized eyes are a giveaway that this is fundamentally a nocturnal feeder, it spends daylight hours conserving energy in shelter and only properly hunts small invertebrates once the reef darkens.
No clear seasonal pattern shows up in the sightings, and with a comfortable range of roughly 25 to 29C, tropical reefs in French Polynesia and Hawaii stay within its comfort zone all year. Treat it as a year-round find rather than something tied to a particular month.
Most consistently logged in French Polynesia, especially around the Tuamotu Islands, with a smaller but reliable presence in Hawaii. Divers exploring reef ledges and lagoon drop-offs in these regions have the best chance of a sighting, though it stays uncommon even where it turns up.
Mapping where Bluelined Squirrelfish is logged…
The strongest sightings come from French Polynesia, particularly the Tuamotu Islands, with additional records from Hawaii. Look on reef ledges, drop-offs, and areas with plenty of crevices and overhangs.
There is no strong seasonal pattern in the sighting data, and warm water in the mid-to-high 20s Celsius keeps it comfortable on tropical reefs year-round. Any month works, though dawn, dusk, and night dives near sheltered ledges improve your chances.
Look for a slender reddish-brown and white striped fish around 23 cm long with large reflective eyes, usually seen peeking out from a reef crevice or cave rather than swimming in the open.
They typically reach about 23 cm in length, making them a modest-sized reef fish rather than anything imposing.
No, they pose no danger to divers. They spend the day hiding in reef structure and are more interested in avoiding attention than interacting with anyone nearby.
Their oversized eyes are built for low-light hunting. They shelter in dark reef crevices by day and become active nocturnal feeders once the light fades.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Soldierfish
3,621 sites
