Scolopsis lineata
Common on reefs from Sabah to Okinawa, this silvery bream sits at 1-20m in warm 26-29 C water almost year-round.
A slim, silvery fish around 17 cm with faint horizontal lines running along the flanks that give it the latticed look in its name. Look for a dark blotch near the upper edge of the gill cover and a pointed snout typical of monocle breams. It usually holds a steady mid-water posture just above the reef rather than darting between crevices like a butterflyfish.
Divers most often find it hovering singly or in loose small groups just above the reef structure, picking at small invertebrates in the sand or rubble rather than grazing coral like the butterflyfish it shares reefs with. It tends to hold its distance from divers without bolting for cover, making it an easy, unhurried fish to photograph on a slow reef pass. Most logs come from shallow to mid depths, consistent with its 1 to 20 m range.
As a carnivore feeding on small reef invertebrates rather than coral polyps, it fills a different niche to the butterflyfish it is grouped alongside, making it a useful reef-health indicator for sandy and rubble patches rather than coral cover itself.
Sightings show no clear seasonal pattern, and with a comfortable range of 26 to 29.3 C it stays on these reefs year-round, so any month works for a trip built around it.
Reef neighbours a diver could mistake it for. Use the identification notes above to tell them apart.
This is a reliable sighting across reefs in Malaysia, the Philippines, Indonesia, Japan and Thailand, with the strongest logs coming from Peninsular Malaysia's east coast and Sabah, the Visayas and Palawan in the Philippines, Okinawa and the Ryukyu Islands in Japan, and Nusa Tenggara in Indonesia. Phuket and Koh Lipe in Thailand also turn it up regularly, usually as an uncommon but expected find rather than a headline sighting.
Mapping where Latticed Monocle Bream is logged…
It turns up widely across Malaysia, the Philippines, Indonesia, Japan and Thailand. The strongest sightings come from Sabah and Peninsular Malaysia's east coast, the Visayas and Palawan in the Philippines, and Okinawa in Japan.
There is no strong seasonal pattern in sightings, and it lives comfortably in 26 to 29.3 C water year-round, so it can be seen on tropical reefs in any month.
Look for a silvery, slim-bodied fish around 17 cm with faint horizontal lines along its sides and a dark mark near the gill cover. It usually sits steady in mid-water above the reef rather than weaving through coral.
They typically reach around 17 cm, a modest size that fits their habit of hovering unobtrusively over reef flats and rubble patches.
No. They are harmless reef fish with no venom or aggressive behaviour towards divers, and typically keep a calm distance while you pass.
Site and sighting data is aggregated from diver logs, iNaturalist and GBIF. For taxonomy and conservation status:
Melon Butterflyfish
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