🐟 AquaticCare difficulty: IntermediateLegal complexity: Medium
Volitans lionfish
Pterois volitans · also called Red lionfish, Common lionfish, Turkeyfish, Butterfly cod, Devil firefish
The volitans is the classic show-stopper lionfish: long, flowing pectoral and dorsal fins, bold red-white-brown barring, and venomous dorsal spines. A hardy, slow-moving ambush predator that quickly learns to beg at the glass, it is a centerpiece for large fish-only or aggressive predator tanks rather than reef systems.
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Quick facts
| Size | Up to 38 cm (15 in) in the aquarium; one of the largest commonly kept lionfish. |
| Lifespan | 10–15 years |
| Social needs | solo |
| Native region | Indo-Pacific, from the Red Sea and East Africa to French Polynesia; invasive in the western Atlantic and Caribbean. |
| Origin | Old World |
| Climate | 🌴 Tropical |
| Water type | 🌊 Marine |
| Family | Scorpaenidae |
| Genus | Pterois |
Part of the Lionfish
Venomous-spined scorpionfish kept as charismatic predatory display fish; striking and personable but requiring respect for their spines and predatory appetite.
Habitat & space requirements
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Habitat & enclosure
Provide a minimum of 75 gallons (285 L) for a single adult, with 120 gallons or more preferred to accommodate its eventual 15-inch size and swimming room. Keep tropical marine parameters: temperature 24-27 C (75-80 F), pH 8.1-8.4, specific gravity 1.020-1.025, and ammonia/nitrite at zero with nitrate kept low through good husbandry.
Lionfish appreciate moderate, indirect flow rather than strong laminar current, and dim to moderate lighting suits their crepuscular ambush habits. Build plenty of overhangs, caves, and rockwork so the fish can hang in the shade and hover upside-down beneath ledges, which is normal resting behavior.
Substrate
Fine aragonite sand or a bare bottom both work; lionfish do not sift substrate, so choice is driven by tankmates and filtration. Aquascape with stacked live rock forming caves and overhangs where the fish can shelter and ambush.
Equipment & setup
Use robust filtration sized for a heavy meaty-protein bioload: an oversized protein skimmer, ample biological media, and frequent water changes. A reliable heater holds tropical temperature, and moderate powerhead flow keeps detritus suspended without blasting the fish. Standard fish-only lighting is sufficient.
Diet
An obligate carnivore that hunts live and meaty foods. Wean specimens onto fresh or frozen silversides, shrimp, squid, and chunks of marine fish flesh; many will take food from a feeding stick or tank tongs. Avoid a long-term diet of freshwater feeders such as goldfish or rosy reds, which cause fatty liver disease and thiamine deficiency. Feed juveniles every 1-2 days and adults two to three times weekly; soaking foods in a vitamin supplement helps prevent nutritional disorders.
Behavior & temperament
Not reef-safe in the sense that it will swallow any fish or ornamental shrimp small enough to fit in its large mouth, but it ignores corals and sessile invertebrates. Generally peaceful and even sluggish toward tankmates it cannot eat. Suitable companions include similarly sized non-aggressive predators such as triggers, larger tangs, puffers, eels, and groupers. House only one lionfish per tank unless the system is very large, and never keep with fish small enough to be prey. The dorsal, anal, and pelvic spines deliver a painful venom, so handle with extreme care.
Health
Hardy but susceptible to marine ich (Cryptocaryon) and marine velvet (Amyloodinium), especially after stress. Watch for lateral-line erosion and bloat from overfeeding. The most common chronic killer is poor diet, particularly feeder fish, leading to fatty degeneration. Lionfish are sensitive to copper-based medications, so prefer hyposalinity, tank-transfer, or quarantine-based treatments. A venomous spine sting to a keeper causes intense pain; immerse the wound in hot (not scalding) water and seek medical advice.
Tips, DIY & hacks
Drip-acclimate slowly over 45-60 minutes and quarantine before introduction, as lionfish stress easily during shipping. Train picky new arrivals onto frozen food by wiggling silversides on a feeding stick to mimic live prey. Keep a venom-sting first-aid plan (hot-water immersion) posted near the tank, and always assume the spines are dangerous even in a calm fish.
Sources
- Pterois volitans - Wikipedia (encyclopedia)
- Volitans Lionfish - LiveAquaria (care guide)
- Wikipedia: Volitans lionfish (wiki)