How to spot the Lionfish when scuba diving
Pterois radiata
Native to the Indo-Pacific from the Red Sea to Western Australia and east to French Polynesia. Also found throughout Micronesia and the South Pacific. Invasive in the Western Atlantic, Caribbean, and Mediterranean. Multiple species exist with varying ranges.
Can be encountered year-round in their habitats. Often more active during dawn and dusk when hunting, but readily visible during day dives as they frequently hover in place under ledges or near reef structures.
Found in tropical and warm temperate waters, typically in temperatures between 22-28°C (72-82°F), though can tolerate a wider range.
Common on coral reefs, rocky outcrops, and wrecks from shallow waters down to 50m (occasionally deeper). In the Indo-Pacific, look along reef walls, under overhangs, and near caves. In the Atlantic/Caribbean (where they're invasive), they're often found in high concentrations on any structured habitat. Maintain a safe distance as their spines are venomous. Their distinctive appearance and relatively stationary behavior make them easy to spot once you locate their preferred habitat.
Worldwide observation of the Pterois radiata
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Data sources
- Photos: Wikimedia Commons
- Distribution and specie data: GBIF (Global Biodiversity Information Facility)
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