Electric Green Galaxy Coral Frag

Description:

• Scientific Name: Galaxea fascicularis

• Common Names: Galaxea Coral, Galaxy Coral, Crystal Coral, Starburst Coral

• Type: LPS (Large Polyp Stony) Coral

• Appearance:

  • Dense colony of tiny polyps that extend from a hard, encrusting or branching skeleton.

  • Polyps resemble little anemones or stars, with thin tentacles and often neon green, purple, brown, or pinkish hues—some with glowing tips.

  • Often shimmers or sparkles under actinic lighting.

  • Famous (and feared) for its super long sweeper tentacles that can stretch up to 6+ inches at night.

Care Level: Moderate

Galaxea corals are hardy and fast-growing under the right conditions, but their aggressiveness requires mindful placement.

Do:

• Place it in a spacious area – At least 6–10 inches from other corals to account for sweeper tentacles.

• Feed 1–2x/week – Polyps readily accept mysis shrimp, brine shrimp, reef roids, and other fine foods.

• Provide stable water parameters and moderate lighting for best growth and coloration.

• Use random or indirect flow to prevent detritus buildup without stressing polyps.

Avoid:

• Crowding it near other corals – It will almost certainly sting and damage them at night.

• Sharp changes in alkalinity or salinity – Can cause recession or stress.

• Too much direct flow – Can cause the polyps to stay retracted.

Fragging:

• Easy to frag – Grows in a branching or encrusting form with a hard skeleton. Simply break or saw off a piece of the colony and glue it to a frag plug or rock.

• Use proper protective gear (gloves & goggles), as some LPS corals can release toxins.

Common Issues:

• Tissue recession – Often from unstable water conditions or damage from other corals/fish.

• Aggression – The coral is healthy, but its long sweepers can wreck tankmates overnight.

• Brown jelly disease – Possible if tissue is damaged, though less common in Galaxea.

Bonus Tips:

• Glows beautifully under blue/actinic lighting, with neon tentacle tips standing out dramatically.

• If you're growing a coral garden, place Galaxea in isolation or surrounded by plenty of sand space.

• It can grow fairly quickly and will encrust or branch, so keep an eye on its spread.