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Galaxea

Galaxea coral, also known as Galaxy Coral, is an LPS species prized for its translucent tentacles tipped with tiny white balls, giving colonies a glittering, star-like appearance when fully extended. It thrives primarily through photosynthesis but will also take in liquid coral food, letting keepers support its growth and coloration through feeding. Mature colonies grow to roughly 10-30cm and, with stable care, can live for more than a decade. One thing to watch for is its long sweeper tentacles, which sting nearby corals, so it needs generous spacing in the tank. Considered an intermediate-level coral, Galaxea suits keepers who already have some experience managing water quality and flow.

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About Galaxea

Galaxea coral (Galaxy Coral) features translucent tentacles tipped with white spheres. This intermediate-level LPS species grows 10-30cm, lives over 10 years, and feeds via both photosynthesis and liquid food.

7 things to know before welcoming a Galaxea

  1. 1Watch for Sweeper Tentacles

    Galaxea extends long sweeper tentacles that can sting neighboring corals. Keep generous spacing between colonies and avoid placing delicate corals within tentacle reach.

  2. 2Feeding Boosts Growth

    While Galaxea can survive on photosynthesis alone, supplementing with liquid coral food can support better coloration and growth. Feed while the tentacles are extended for best results.

  3. 3Give It Room to Grow

    Because its tentacles extend widely, place Galaxea where it won't touch neighboring corals or live rock. A gentle flow that lets the polyps sway comfortably works best.

  4. 4Grows Into a Centerpiece

    Mature colonies reach roughly 10-30cm, becoming a real presence in the tank. Picture its eventual size when choosing a spot, rather than judging by how small it looks at first.

  5. 5A Decade-Long Companion

    Galaxea can live for over 10 years when water quality and conditions stay stable. When setting up, think ahead about future aquascape changes and choose its position accordingly.

  6. 6Best for Intermediate Keepers

    Keeping Galaxea healthy means balancing lighting, water quality, and flow together, so it's considered suited to intermediate keepers. Some prior coral-keeping experience helps.

  7. 7Acclimate With Care

    Galaxea is sensitive to sudden changes in water parameters, so a slow, careful acclimation matters at arrival. A brief observation period before placing it near other corals is also wise.

Frequently asked questions about Galaxea

Q.Is Galaxea coral suitable for beginners?
A.Galaxea is generally considered suited to intermediate keepers rather than complete beginners, since it requires steady management of water quality, flow, and lighting. Having some prior coral-keeping experience makes it easier to maintain successfully.
Q.Can it be kept alongside other corals?
A.Galaxea extends long sweeper tentacles that can sting corals placed too close to it, so it needs generous spacing from its neighbors. When planning your aquascape, allow room for its eventual spread.
Q.Does it need to be fed?
A.It can survive on photosynthesis alone, but feeding it liquid coral food can support better growth and coloration. Feeding isn't mandatory, but it's worth incorporating based on how the coral is doing.
Q.How large does it eventually grow?
A.Mature colonies typically reach around 10 to 30cm. It's a good idea to plan for that eventual size and leave enough open space in the tank.
Q.Where's the best spot to place it in the tank?
A.Since its tentacles spread widely, choose a spot with enough clearance from other corals and live rock. It prefers moderate, gentle water flow rather than strong currents.

Useful tools for Galaxea care

Learn more about Galaxea in the encyclopedia

View Galaxea encyclopedia entry →

Care difficulty, lifespan, size and diet — all basics covered.

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