Spotfin Lionfish

Spotfin Lionfish

Scientific name: Pterois antennata
Common names: Spotfin Lion, Antenna Lionfish
Family: Scorpaenidae

Description

The Spotfin Lionfish is a striking and elegant predator, recognised by its long, flowing fins covered in distinct dark spots, especially on the pectoral fins. Compared to the more common Volitan Lionfish, the Spotfin remains smaller and has a more refined appearance. It is a slow, graceful swimmer that makes a dramatic display fish in a marine predator aquarium.

Care Requirements

Tank Size

• Minimum tank size: 250–300 litres (65–80 gallons)

• Larger tanks recommended for adults and stable water conditions

Temperament

• Peaceful but predatory

• Will eat any fish or shrimp small enough to fit in its mouth

• Generally ignores larger tank mates

Reef Compatibility

• ❌ Not reef safe

• Will consume:

  • Small fish

  • Shrimp

  • Crabs

• Corals are usually ignored but not recommended due to feeding and bioload

Tank Setup

• Live rock with caves and overhangs

• Low to moderate flow (avoid blasting fins)

• Dim to moderate lighting preferred

• Secure lid (can jump when startled)

• Efficient filtration due to meaty diet

Water Parameters

• Temperature: 24–27°C

• pH: 8.1–8.4

• Salinity: 1.023–1.026

• Ammonia/Nitrite: 0

• Nitrate: <20 ppm

Diet & Feeding

• Carnivorous

• Feed a varied diet:

  • Frozen silversides

  • Mysis shrimp

  • Chopped prawns

  • Squid

  • Marine carnivore foods

📝 Most Spotfin Lions can be trained onto frozen foods; avoid long-term live feeding.

Feeding Frequency

• 2–3 times per week (adults)

• Juveniles may eat more frequently

Adult Size

• Up to ±20–25 cm

Compatibility Notes

• Avoid housing with:

  • Small fish

  • Small crustaceans

• Suitable tank mates:

  • Groupers

  • Large wrasses

  • Hawkfish

  • Large angelfish

  • Other lionfish (with space)

Safety & Special Notes

⚠️ Venomous spines

• Stings are painful (not usually life-threatening)

• Use caution during maintenance

• Do not net – use containers when moving

• Hardy once established

• Slow eater – ensure it is not outcompeted

• Best suited for intermediate to experienced marine keepers