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Red Lionfish

Pterois volitans

Red Lionfish

LC

Unlocked at Accreditation Tier 4

Statistics

Native rangeIndian Ocean, Pacific Ocean
Population in wildUnknown
Conservation statusLeast Concern
Enclosure typeAquarium
Habitat typeAquatic
TemperamentConfident
Periodic food expenses177.00
EditionBase Game

The red lionfish (or Pterois volitans) is a venomous reef fish native to the Indo-Pacific region, including the Red Sea, Indian Ocean, and western Pacific. Due to aquarium releases, it has become a well-established invasive species in the western Atlantic, Caribbean Sea, and parts of the Gulf of Mexico, where it threatens native marine ecosystems. Red lionfish typically inhabit coral reefs, rocky outcrops, lagoons, and seagrass beds.

The fish is easily recognised by its white and red body stripes, fan-like pectoral fins, and long venomous dorsal spines.

Adults measure 25cm to 32cm in length and weigh 1.2kg to 1.5kg, with males being slightly larger than females but otherwise no apparent difference between the sexes.

Habitat

Minimum habitat requirements

Planned population

adults

Space

Deep water16 m²

Barrier

StrengthGrade 2
Height1 m
Water barrierNot allowed

Terrain

Soil0–50%
Sand30–80%
Fine sand25–80%
Rock20–70%

Environment

Habitat temperature22 – 28 °C
Plant coverage0 – 100 %
SalinitySaltwater
DislikesSnow

Preferred group ranges

Mixed group1 – 20 (up to 19 males, up to 19 females)
Male group1 – 20
Female group1 – 20

Social

Offspring dispersalAll offspring
Mating systemPromiscuous
DominanceMale dominance based on size
Guests can walk throughYes

Red lionfish are solitary but will gather in temporary harems during breeding events.

Release

Release requirements

ResearchNot needed

Solitary Male

Males1
Min. longevity30%
Min. fertility20%

Release Groups can only be released via Conservation Projects or Quick Release.

Solitary Female

Females1
Min. longevity20%
Min. fertility30%

Conservation

The red lionfish is of Least Concern, and poses serious conservation challenges as an invasive species in the Western Central Atlantic. Introduced through the aquarium trade in the 1980s, lionfish have since spread rapidly due to their lack of natural predators and high reproductive rates. Their generalist diet has made them a top predator in many invaded habitats, and they significantly reduce populations of native reef fish by consuming large quantities of juvenile fish and crustaceans.

A variety of management and control efforts have been implemented to mitigate their impact. Organised lionfish culling programs, such as spear-fishing derbies and targeted removal dives, aim to suppress local populations and reduce pressure on native species. They are also being promoted as a human food source alongside safe handling techniques to encourage commercial harvesting. Research is being done to understand how native predators may accept lionfish as a food source as a long-term goal.

While eradication is currently impossible, the spread and ecological damage may at least be minimised.

Research

LevelUnlocksBonusResearch gate
1Thriving Requirement 1: at least 20 objects or plants with the Rocks tag; Red Lionfish Fact Sheet
2Thriving Requirement 2: at least 5 objects or plants with the Coral tag; Fertility Level 1Fertility (+15%)
3Thriving Requirement 3: Food Grade 2; Release groups and release to the wild
4Thriving Requirement 4: Coarse Sand terrain
5Thriving Requirement 5: Smooth Rock terrain; Fertility Level 2Fertility (+30%)

Conservation topics

Carnivore DietClimate ChangeInvasive SpeciesNocturnal BehaviourRay-finned Fish EvolutionRed Lionfish Fact SheetRed Lionfish Name PlateReef Ecosystem AmbienceSwimming AnimalsUnderwater Life Talk

Life

Reproduction

Mating seasonAseasonal
Litter size1 – 5
Interbirth period6 months
Reproduction difficultyVery Easy
Age of sexual sterilityDeath
Age of sexual maturity1 yrs

Lifecycle

Life expectancy10 – 20 yrs
Juvenile1 yrs
Adult8 yrs
Elderly11 yrs

Body

Sizemale 34 cmfemale 34 cm

Breeding

Red lionfish mate year-round, though peaks in frequency in warmer months, which may be as often as every 4 days. A single, territory-holding male may gather a temporary harem of up to 7 receptive females. Courtship in such a harem involves circling, sidewinding, and leading displays. As broadcast spawners, the females release 4,000 to 30,000 eggs each, which float just below the surface, and the male releases his sperm so that the eggs are fertilised externally.

Once fertilised, the embryos develop rapidly, and larvae hatch approximately 36 hours after fertilisation. The lionfish larvae are free-swimming and pelagic, developing for 20 to 40 days while feeding on microscopic zooplankton. After this stage, they transition into their juvenile reef-dwelling form and settle in the benthic zone.

Red lionfish mature at around 1 year of age, coinciding with a body length of 17.5cm to 18cm in females and 10cm to 18cm in males.