Rock Flower Anemones
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Rock Flower Anemones (Actinodiscus spp.) are small, colorful anemones that add a pop of movement and texture to your reef. They come in a variety of bright colors and display a charming pulsating behavior, making them a lively addition to any tank.
Rock Flower Anemones are striking large polyp anemones prized for their unique tentacles and vibrant, neon-like coloration. They are often available in shades of green, purple, pink, orange, and metallic hues, and their mesmerizing movement adds a dynamic focal point to reef aquariums. Rock Flower Anemones are hardy and can adapt to a range of reef conditions, making them suitable for both beginner and experienced aquarists.
Description:
Common Names: Rock Flower Anemone, RFA
Scientific Name: Phymanthus species
Family: Phymanthidae
Temperament: Semi-aggressive (can sting nearby corals and invertebrates)
Difficulty: Easy
Native Habitat & Distribution:
Native to the Caribbean Sea, Rock Flower Anemones inhabit shallow reef flats, lagoons, and rocky substrates with moderate currents. They attach firmly to rock, sand, or rubble and prefer stable, well-lit conditions.
Aquarium Care & Setup:
Temperature: 74–82°F (23–28°C)
pH: 8.1–8.4
Salinity: 1.024–1.026
Flow: Moderate; allows tentacles to sway without damage
Lighting: Low-Medium
Placement: Rockwork or rubble with ample room to expand and prevent stinging neighbors
Care Tips & Feeding:
• Feeding: Photosynthetic but benefit from supplemental feeding with small meaty foods such as mysis shrimp, brine shrimp, or chopped seafood 1–2 times per week
• Growth Pattern: Expand gradually over rockwork or substrate; can reach several inches in diameter
• Tankmates: Compatible with peaceful fish and invertebrates; avoid placing too close to delicate corals
• Behavior: Semi-aggressive; sweeps tentacles to capture food and defend territory
Are Rock Flower Anemones easy to keep?
Yes, they are moderately hardy and adapt well to stable reef aquariums with proper lighting and flow.
What lighting do Rock Flower Anemones need?
Low-Medium lighting is recommended for health and vibrant coloration.
Do Rock Flower Anemones need feeding?
They are photosynthetic but benefit from occasional supplemental feedings of meaty foods 1–2 times per week.
Where should I place Rock Flower Anemones in my tank?
On rockwork or rubble with room to expand and tentacles to move freely.
How fast do Rock Flower Anemones grow?
Growth is moderate; they expand gradually and can cover several inches in diameter over time.
Are Rock Flower Anemones aggressive?
Yes, they are semi-aggressive and may sting nearby corals and invertebrates if placed too close.
