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FishintermediateSaltwater

Volitans Lionfish

Pterois volitans

AnimaliaChordataActinopterygiiScorpaeniformesScorpaenidae

📍 Indo-Pacific (invasive in Atlantic)

Ask Finn

The iconic lionfish with dramatic, flowing venomous spines and bold red-and-white banding. Venomous dorsal spines can inflict painful injuries. Will eat any fish or shrimp small enough to swallow. Hardy and long-lived.

Size15"
Min Tank120g
semi-aggressive
Zonemid

Care Guide

Diet

Volitans lionfish are strict carnivores that require live or frozen meaty foods such as small fish, shrimp, and squid. Feed 2-3 times per week with appropriately-sized prey items (no larger than half the lionfish's mouth width). Frozen options like silversides, capelin, and thawed frozen shrimp are readily accepted and safer than live prey.

Behavior

These iconic predators are semi-aggressive and relatively sedentary, spending much of their time hovering or resting near structures. They are primarily nocturnal hunters that use their venomous spines for defense and prey capture. Lionfish are generally solitary and territorial; handle with extreme caution as their venomous dorsal spines can inflict painful, potentially serious injuries to aquarists.

Breeding

Breeding volitans lionfish in captivity is extremely rare and difficult, with very few documented successful spawns in home aquariums. They require very large tanks, specific water conditions, and live planktonic food for larvae, making captive breeding impractical for most hobbyists. Wild-caught specimens are the norm in the aquarium trade.

Common Diseases

Parasitic Infections (Marine Ich)

Symptoms

White spots on body and fins, rapid breathing, flashing against surfaces, lethargy

Treatment

Increase water temperature gradually to 28-29°C, maintain excellent water quality, use copper-based treatments or hyposalinity therapy; quarantine infected fish

Bacterial Infections

Symptoms

Fin rot, open sores, cloudy eyes, loss of appetite, discoloration around wounds

Treatment

Perform large water changes, improve water quality, use antibiotic medications (e.g., kanamycin or tetracycline) if severe; isolate in quarantine tank

Venomous Spine Injuries (to handler)

Symptoms

Severe localized pain, swelling, numbness, potential systemic effects depending on venom load

Treatment

Immediately soak affected area in hot water (as hot as tolerable, 43-45°C) for 20-45 minutes; seek medical attention; pain management and antibiotics may be needed

Feeding Refusal

Symptoms

Loss of appetite, weight loss, lethargy, hiding behavior

Treatment

Check water parameters (pH, salinity, temperature); offer varied prey items; ensure tank is not overcrowded; may indicate stress or poor acclimation

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Quick Facts

pH
8.1–8.4
diet
carnivore/fish/shrimp
maxSize
15 inches
salinity
SG 1.020–1.025
minTankSize
120 gallons
temperature
75–82°F (24–28°C)

Temperature

75–82°F

24–28°C

Stats

Community tips0
Kept by0 hobbyists