Natural variantRare in the tradeIntermediate to keep

Rainbow Octospawn

A variant of Hammer coral (Euphyllia ancora)

Representative Hammer coralphoto — a dedicated image of this exact morph isn't available yet.

An octospawn (a related Euphyllia, not the true hammer E. ancora) displaying a multi-tonal mix of neon green, pastel pink, gold and orange across its rounded tentacle tips.

📜 Backstory

Sold as the 'Rainbow Octospawn Coral' (WYSIWYG) by Top Shelf Aquatics. It is a wild-collected high-color octospawn traded under the 'rainbow' grading label rather than a single named lineage, so the precise origin is not documented.

Keeper tips for this variant

Use blended white/blue light to show the full rainbow and keep flow gentle; octospawn tissue is delicate and tears in strong current. Leave space from other corals.

This page covers the Rainbow Octospawn variant. For full husbandry, water params, diet and health —General care: Hammer coral →

Other LPS Corals variants

Gold Hammer Toxic Green Hammer Designer metallic / splatter hammers Green Hammer (Wall)Branching Hammer Gold/Torch-Gold Hammer (Gold Hammer)Octo / Wall Octo Hammer Gold Torch / 24K Hammer Rainbow Hammer Indo / Aussie Gold Hammer Orange Hammer Branching Green Hammer Wall (Octopus) Green Hammer Rainbow Branching Hammer Splatter Branching Hammer Golden Splatter Branching Hammer Neon Splatter Branching Hammer Holy Grail Hammer Indo Gold Branching Hammer Aussie Gold Hammer Gold Wall Hammer Cornbred Dreamsicle Hammer Gold Rainbow Mint Hammer Golden Octospawn Gold Tip Frogspawn