Lionfish
Pterois miles
Characteristics
Scientific name
Size
Depth range
Nutrition
Behave
Frequency in Cyprus
Protection status
Native/Immigrant
Pterois miles
Usually 20 to 35 cm in length, reaching a maximum of around 45 cm.
From 1 to over 100 metres depth.
Predatory; feeds on small fish, shrimp, crustaceans, and other invertebrates.
Usually solitary, territorial, and most active during dawn and dusk.
Now common and continuing to increase in abundance.
No protected status in the Mediterranean; considered an invasive species.
Lessepsian migrant species originating from the Red Sea.
The Lionfish (Pterois miles) is one of the most striking invasive species in the Mediterranean Sea. Easily recognised by its long fin rays and distinctive red-and-white striped pattern, it has become increasingly common around Cyprus since entering the Mediterranean through the Suez Canal. Today, it is regularly encountered at many dive sites across the island. Although its spines are venomous, the species is also regarded as an excellent food fish.
Where to Find in Cyprus: Dive Sites & Habitat
The Lionfish (Pterois miles) is native to the Indian Ocean and the Red Sea. It entered the Mediterranean through the Suez Canal and was first recorded regularly around Cyprus during the 2010s.
Today, Cyprus is considered one of the areas with the highest lionfish densities in the Mediterranean. The species inhabits rocky reefs, caves, wrecks, drop-offs, and artificial reefs, ranging from shallow waters to depths well beyond recreational diving limits.
Today, divers can encounter lionfish almost anywhere around the island. They are particularly common at structurally rich dive sites such as Zenobia, Caves & Tunnels, Cyclops Cave, and many of the natural rocky formations around Cape Greco. Sightings are possible throughout the year, and local populations continue to increase.
Behavior & Key Features Underwater
The Lionfish (Pterois miles) is a highly effective ambush predator. By spreading its large pectoral fins, it corners small fish and then sucks them in with remarkable speed. Its dorsal, pelvic, and anal spines contain venom that can cause extremely painful injuries if touched. For divers, the rule is simple: look, but do not touch.
In the Mediterranean, the species represents a significant ecological challenge. Lionfish reproduce rapidly, can reach high population densities, and consume large numbers of native juvenile fish. At the same time, natural predators are absent or relatively uncommon in many areas. One possible reason is the long-term overfishing of large predatory species such as sharks and groupers, which might otherwise help control lionfish populations.
Nevertheless, some encouraging observations have emerged. In the eastern Mediterranean, groupers, several shark species, and octopuses have been documented as potential natural predators of lionfish. Interactions between lionfish and the invasive Silver-cheeked Toadfish (Lagocephalus sceleratus) have also been observed. Whether these species can contribute to effective long-term population control remains the subject of ongoing scientific research.
Another notable feature of the lionfish is that it is highly regarded as a food fish. Its flesh is white, firm, low in bones, and considered very tasty. Once the venomous spines have been properly removed, the fish is completely safe to eat. For this reason, many regions actively encourage the capture and consumption of lionfish as a way of helping to limit its spread.
Frequently asked Questions (FAQ)
Is the Lionfish dangerous to divers?
Its venomous spines can cause painful injuries if touched. However, lionfish are not aggressive and do not actively attack humans.
Why is the Lionfish spreading so rapidly in the Mediterranean?
The species reproduces very quickly and currently has relatively few natural predators in the Mediterranean. At the same time, many large predatory fish such as sharks and groupers have become much less common due to overfishing.
Can Lionfish be eaten?
Yes. Once the venomous spines have been removed, lionfish are an excellent food fish with firm, white flesh.
Written by
Daniel "KID"