Pelagic fish
Cobia
Rachycentron canadum
IUCN status: Least concern
A long, dark, shark-shaped fish that shadows structure and sometimes divers, and is routinely mistaken for a grey reef shark on first sight. IUCN lists it Least Concern. In Cambodia it is the signature fish of the Koh Rong Sanloem wall sites and gives Cobia Point its name.
- Max size
- Up to about 2m
- Habitat
- Open water over reef, wrecks and structure in warm seas worldwide except the eastern Pacific
Best places to dive with Cobia
rareoccasionalcommonly seenpeak season
Koh Rong Archipelago
| Month | Likelihood |
|---|---|
| January | occasional |
| February | occasional |
| March | occasional |
| April | occasional |
| May | occasional |
| June | occasional |
| July | occasional |
| August | occasional |
| September | occasional |
| October | occasional |
| November | occasional |
| December | occasional |
Reported year-round at Cobia Point and Sponge Garden off Koh Rong Sanloem. Sightings are not seasonal but are not guaranteed on any given dive.
Sources & last checked
Checked August 2026
This is a researched draft, not yet human-verified. The seasonality and logistics are drawn from the sources below — confirm specifics (permits, fees, closures) with an operator before you book.
- Koh Rong Sanloem dive sites — Scuba Nation Diving Centre
- Cobia (Rachycentron canadum) - conservation status — Wikipedia