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🐟 AquaticCare difficulty: IntermediateLegal complexity: Low

Frogspawn coral

Euphyllia divisa · also called Grape coral, Honeycomb coral, Octospawn (related), Wall frogspawn, Branching frogspawn

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Frogspawn coral

A hardy Euphyllia whose tentacles split into multiple grape- or egg-shaped tips that resemble a mass of frogspawn. Available in branching and wall forms and in green, gold, and metallic morphs, it is one of the more forgiving LPS corals — though, like its relatives, it wields stinging sweeper tentacles and needs space from neighbours.

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Quick facts

SizeClusters of forked tentacles tipped with rounded bubble-like ends resembling frog/fish eggs; colonies branch or form walls and spread to 8-12+ in (20-30+ cm) ov
Lifespan5–50 years
Social needssolo
Native regionIndo-Pacific
OriginOld World
Climate🌴 Tropical
Water type🌊 Marine
FamilyEuphylliidae
GenusEuphyllia

Part of the LPS Corals

Large-polyp stony corals (brains, Euphyllia, Goniopora, Scolymia, Lobophyllia, Favites, Acan, Dendro, Octospawn) with fleshy polyps over a calcium-carbonate skeleton. Intermediate-care reef corals that appreciate moderate light/flow and direct feeding.

Acanthophyllia (Meat Coral)AlveoporaBlastomussaBubble coralCandy cane coralChalice coralDendrophyllia (Branching Sun Coral)Duncan coralElegance coralFavites (Pineapple Brain)Goniopora (Flowerpot Coral)Hammer coralLobophyllia (Lobed Brain / Meat Coral)Micromussa (Micro Lord)+7 more →

Habitat & space requirements

From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.

Photo coming soon
Minimum

Stable nano reef

20+ gal / SG 1.025 / Alk 8-9 dKH / Ca 420-440 / Mg 1300-1400

LPS coral — needs more stable Alk/Ca/Mg than soft corals. Medium light, LOW flow (sweepers/tentacles need calm to extend). Some target-feeding helps. Frogspawn (Euphyllia divisa) — Euphylliid; LONG SWEEPER TENTACLES — give 6+ in clearance from neighbours.

Photo coming soon
Recommended

Established 40+ gal reef

40+ gal cycled 6+ mo / stable Alk

Established reef with calm pockets for tentacle extension. Target-feed mysis/PE pellet 1-2× weekly. Watch for sweeper tentacles stinging neighbours.

Photo coming soon
Ideal

Mature reef + LPS garden

75+ gal / show-quality stability

Mature mixed reef with dedicated LPS placement (low rockwork or sand) and spacing for sweepers. Stable parameters > peak parameters. Frogspawn (Euphyllia divisa) — Euphylliid; LONG SWEEPER TENTACLES — give 6+ in clearance from neighbours.

Life & growth stages

How this animal changes through its life — each stage often has its own care, diet and space needs.

Photo coming soon
Planula larva

Corals begin as a free-swimming planula larva released into the water column after spawning or brooding. The tiny, ciliated larva drifts and swims until it finds suitable hard substrate to settle on.

Photo coming soon
Single polyp

Once settled, the larva metamorphoses into a single founding polyp that secretes a calcium-carbonate (or proteinaceous) base and extends a ring of tentacles to feed. Reef-building corals begin laying down skeleton at this stage.

Mature colony stage
Mature colony

The founding polyp buds asexually into a colony of many genetically identical polyps, building the species' characteristic growth form — branching, plating, encrusting, or massive. A mature colony can reproduce and contributes to reef structure.

Color & pattern variants

Natural variants occur in the wild; selectively bred (man-made) variants were developed in captivity.

Natural
Green Frogspawnrepresentative

Green Frogspawn

CommonIntermediate

The classic frogspawn (*Euphyllia divisa*, now often placed in *Fimbriaphyllia*) with branching, grape-like tentacle tips in fluorescent green, often with paler or pink-tipped ends, billowing in gentle flow.

Tip: Moderate light (PAR ~80-150) and gentle, indirect flow so the tentacles inflate fully; keep it away from other corals since its sweeper tentacles sting neighbors.

Gold/Metallic Frogspawnrepresentative

Gold/Metallic Frogspawn

Wild morphs with golden or metallic bodies and contrasting tips, valued for richer coloration.

Green Frogspawn (Wall)representative

Green Frogspawn (Wall)

CommonBeginner

The standard fluorescent-green-tipped Euphyllia divisa in a wall (non-branching) form. The most common and hardy Euphyllia in the trade.

Tip: Place in moderate, indirect flow so the tentacles sway gently — too much flow keeps the polyp from fully inflating.

Branching Frogspawnrepresentative

Branching Frogspawn

CommonIntermediate

Branching skeletal form where each head sits on its own stalk, making it easy to frag. Same flowing grape-like polyps as the wall type.

Tip: Frag by snapping individual branches with bone cutters; the branching form recovers faster than cutting a wall colony.

Gold/Toxic Green Frogspawnrepresentative

Gold/Toxic Green Frogspawn

UncommonIntermediate

A high-color form with golden-yellow to 'toxic' neon-green tentacles and contrasting tips. Brighter pigment than the standard green.

Tip: Hold the gold tone with stable alkalinity (7-9 dKH) and moderate blue light; alk swings cause rapid tip browning and tissue loss.

Octospawn / Octo Frogspawnrepresentative

Octospawn / Octo Frogspawn

UncommonIntermediate

A frogspawn-type Euphyllia (often Euphyllia paraancora/glabrescens cross-labeled) with rounded eight-tipped polyps. Sits visually between hammer and frogspawn.

Tip: Give a bit more light than standard frogspawn (PAR 100-150) to fuel the fuller polyps, but acclimate slowly to avoid bleaching.

Rainbow / Metallic Frogspawnrepresentative

Rainbow / Metallic Frogspawn

RareAdvanced

Premium morph with purple, pink, or orange tips over a green or gold body. Genuine rainbows are scarce and pricey.

Tip: These high-end pieces are the first to react to 'Euphyllia brown jelly' — quarantine new arrivals and never let detritus settle in the polyp.

Dragon Soul Frogspawnrepresentative

Dragon Soul Frogspawn

RareAdvanced

A named designer line with fiery orange/red tentacles tipped in contrasting green or white. One of the most sought-after Euphyllia trade names.

Tip: Maintain steady, dimmer blue-heavy light to protect the red pigment; if it starts to recede, dose amino acids and stabilize parameters immediately.

Bicolor / Tip Frogspawnrepresentative

Bicolor / Tip Frogspawn

UncommonIntermediate

Two-tone form with a green or tan body and bright pink, purple, or white tips. A budget-friendly step up from plain green.

Tip: Keep at least 6+ inches from other corals — frogspawn has long, potent sweeper tentacles that will sting any neighbor at night.

Gold/Toxic Frogspawnrepresentative

Gold/Toxic Frogspawn

UncommonIntermediate

A frogspawn whose tentacle bodies glow gold-to-neon-yellow-green, often with contrasting tips — brighter and more saturated than the standard green form.

Tip: Slightly higher PAR than green frogspawn helps drive the gold fluorescence; keep flow gentle and indirect, and give space for its sweepers.

Rainbow Frogspawnrepresentative

Rainbow Frogspawn

RareIntermediate

A multicolor frogspawn blending neon green, pink, gold, and orange across the tentacles and tips so the colony reads as a true rainbow. Highly prized and significantly pricier than single-color forms.

Tip: Mid-tank under moderate, blue-rich light with gentle turbulent flow to spread color across the heads; stable parameters help hold the multicolor pigments, which can fade if conditions swing.

Purple Tip Frogspawnrepresentative

Purple Tip Frogspawn

CommonBeginner

The classic frogspawn look: neon-to-grass green tentacles capped with violet-to-blue 'purple' tips that pop hard under actinic light. One of the most popular and recognizable euphyllia color forms.

Tip: Low-to-mid placement under moderate light and gentle indirect flow; blue-heavy light intensifies the purple-tip contrast. A forgiving beginner LPS.

Green Tip Frogspawnrepresentative

Green Tip Frogspawn

CommonBeginner

A frogspawn with gold-brown to tan tentacles tipped in ultra-bright neon green, producing a high-contrast glowing tip under blue light. The simplest and hardiest classic color form.

Tip: Place low-to-mid under moderate light with gentle flow; even modest blue light brings out the neon green tips. The baseline frogspawn most reefers start with.

OG Bicolor Green & Purple Tip Frogspawnrepresentative

OG Bicolor Green & Purple Tip Frogspawn

UncommonBeginner

A specific long-established bicolor frogspawn combining bright green tentacles with strong purple tips, prized for its mature, well-conditioned coloration. Effectively an 'original' green-and-purple combo line.

Tip: Mid-tank under moderate, blue-leaning light and gentle flow; this older line colors up best once fully acclimated and stable. Hardy once settled.

Toxic Green Frogspawnrepresentative

Toxic Green Frogspawn

CommonBeginner

An intensely saturated, almost radioactive neon-green branching frogspawn with little to no contrasting tip, so the whole colony reads as one screaming green. The most vivid of the solid-green forms.

Tip: Moderate light low-to-mid in the tank with gentle flow; avoid very high PAR, which can bleach the toxic green toward washed-out pale. A hardy beginner LPS otherwise.

Neon Wall Frogspawnrepresentative

Neon Wall Frogspawn

UncommonAdvanced

A wall-form (single fused skeleton) frogspawn in bright neon green, more compact and dense than the common branching type. Wall frogspawn are scarcer and grow as a continuous mat of tentacles.

Tip: Wall frogspawn are touchier than branching forms: give stable, slightly lower flow, moderate light (roughly 50-150 PAR), and a clean spot with no detritus trapping at the base to avoid recession and brown-jelly infections.

Aussie Minty Gold Tip Frogspawnrepresentative

Aussie Minty Gold Tip Frogspawn

RareAdvanced

An Australian wall-form frogspawn with minty green tentacles transitioning to gold-yellow tips, a premium Aussie color combo. The 'minty + gold tip' contrast on a wall colony is the signature.

Tip: Treat it as a wall coral: stable moderate light, gentle flow, and a debris-free placement. Aussie euphyllia reward slow acclimation and consistent alkalinity; wall forms are more prone to recession than branching ones.

Gold Indo Branching Octo-Frogspawnrepresentative

Gold Indo Branching Octo-Frogspawn

UncommonIntermediate

An Indonesian branching frogspawn/octospawn intermediate with gold-to-yellow coloring across thick, short-branched tentacles. The warm gold tone over the whole head is the draw.

Tip: Low-to-mid placement under moderate light with gentle flow; the gold pigment holds best under a blue-leaning spectrum rather than very white light.

Solomon Islands Gold Rainbow Octospawnrepresentative

Solomon Islands Gold Rainbow Octospawn

RareIntermediate

A premium octospawn (often listed as *Euphyllia paradivisa*) from the Solomon Islands showing yellow-gold bodies washed with rainbow tones, with the dense, compact eight-tip clusters octospawn are named for.

Tip: Mid-tank under moderate light and gentle flow; octospawn have shorter, denser tentacles than branching frogspawn but still need room to avoid stinging neighbors. Stable parameters keep the gold-rainbow color rich.

Rainbow Octospawnrepresentative

Rainbow Octospawn

RareIntermediate

A multicolor octospawn whose thick tentacles display neon green, pastel pink, gold, and orange together, with the characteristic compact octospawn tip clusters. One of the most sought-after euphyllia color forms.

Tip: Place mid-tank under moderate, blue-rich light with gentle turbulent flow to light up all the colors evenly; keep parameters stable to hold the multicolor pigments.

Gold Octospawnrepresentative

Gold Octospawn

UncommonBeginner

A solid gold-to-yellow octospawn (often listed as *Euphyllia paradivisa* or a 'Gold Tip' *yaeyamensis*), with warm golden tentacles and contrasting paler or gold tips. A clean, single-color premium look.

Tip: Mid-tank under moderate light with gentle flow; a blue-leaning spectrum keeps the gold rich rather than fading it toward brown. A hardy, forgiving octospawn.

Metallic Green Octospawnrepresentative

Metallic Green Octospawn

CommonBeginner

A bright metallic-green octospawn with a reflective sheen across the dense tentacle clusters. The simplest and hardiest octospawn color form, glowing strongly under blue light.

Tip: Low-to-mid placement under moderate light and gentle flow; octospawn appreciate slightly less direct flow than long-tentacled branching frogspawn. A forgiving beginner LPS.

Orange Octospawnrepresentative

Orange Octospawn

RareIntermediate

An uncommon octospawn in warm orange-to-amber tones (often on a lime-green base with orange tips), with the compact octospawn tip clusters. The orange coloration is unusual for euphyllia and commands a premium.

Tip: Mid-tank under moderate, blue-leaning light with gentle flow; avoid overly bright white light, which can dull the orange pigment.

Selectively bred (man-made)
Designer / Rainbow Frogspawnrepresentative

Designer / Rainbow Frogspawn

Line-selected and aquacultured strains chosen for multicolor 'rainbow' bodies and tips, propagated for the frag trade.

WWC Glowbug Frogspawnrepresentative

WWC Glowbug Frogspawn

Ultra-rareIntermediate

A vivid chartreuse-to-neon-yellow branching *Euphyllia divisa* whose long flowing tentacles practically glow under blue light. Reads more yellow than green under actinics, with a uniform single color rather than contrasting tips.

Tip: Place low-to-mid in the tank under moderate light and gentle, indirect flow so the long tentacles sway without retracting or tearing on neighbors. Give plenty of clearance from torches and hammers, which it will sting (and be stung by).

Super Sour Branching Frogspawnrepresentative

Super Sour Branching Frogspawn

UncommonBeginner

A hardy branching frogspawn with bright lime-green and teal coloration that carries a slightly acidic, 'sour' neon tone. Tentacles are long and bubble-tipped in the classic *divisa* style.

Tip: Give it medium light and medium, turbulent flow on the lower-to-mid rockwork; allow space because branching frogspawn add heads quickly and will sting nearby corals. Like most branching euphyllia it is forgiving of minor parameter swings.

Splatter Tip Frogspawnrepresentative

Splatter Tip Frogspawn

UncommonBeginner

A branching frogspawn with green tentacles ending in randomly speckled, multi-color 'splattered' tips mixing pink, gold, and cream. The mottled tip pattern is the defining trait.

Tip: Mount on the lower rockwork in moderate flow and moderate light; the long tentacles need room to extend without contacting hammers or torches. A hardy, forgiving branching form.

Lot of Peaches Frogspawnrepresentative

Lot of Peaches Frogspawn

UncommonBeginner

A branching frogspawn in soft peach, salmon, and cream tones rather than the usual green, giving a warm pastel look. Tips can carry a lighter contrasting blush.

Tip: Use moderate, blue-leaning light to hold the pastel peach color and keep gentle flow; too much intense light can wash the warm tones out. Otherwise an easy, hardy branching euphyllia.

Bi-Color Frogspawnrepresentative

Bi-Color Frogspawn

UncommonBeginner

A two-tone frogspawn pairing a green or teal tentacle body with sharply contrasting differently-colored tips (commonly pink, purple, or gold). The clean color break between body and tip is the appeal.

Tip: Place mid-tank under moderate light with gentle alternating flow; consistent lighting helps preserve the contrast between body and tip. A hardy, beginner-friendly branching form.

Lemon Lime Octospawnrepresentative

Lemon Lime Octospawn

UncommonBeginner

A two-tone octospawn pairing lemon-yellow and lime-green (often with hints of purple) across the head, giving a bright citrus appearance. The yellow-into-green gradient over compact tips is the signature.

Tip: Place mid-tank under moderate light with gentle flow; moderate PAR keeps both the lemon and lime tones distinct. A hardy, beginner-friendly octospawn.

Habitat & enclosure

Place in the lower-to-mid reef in moderate, indirect flow that keeps the tentacles gently moving and free of detritus without battering them. Moderate light of roughly 80-150 PAR suits it; it shows good polyp extension across a fairly wide light range, which is part of why it is considered beginner-friendly among Euphyllia. Keep stable reef water: SG ~1.025, 76-80°F, pH 8.1-8.4, calcium 400-450 ppm, alkalinity 8-11 dKH, and magnesium 1300-1400 ppm, avoiding sharp alkalinity changes.

Substrate

Mount on live rock or a frag plug, securing branching/wall colonies into the rockwork with epoxy or putty. Single heads can rest in a rubble crevice. Keep off the sand bed to prevent grit abrasion and detritus irritation of the soft tissue.

Equipment & setup

Use reef LED or T5 lighting at moderate PAR (~80-150), a powerhead/wavemaker delivering gentle, varied flow, and a protein skimmer. As a stony coral it draws down calcium, alkalinity, and magnesium, so maintain Ca/Alk/Mg with a balanced two-part or dosing regimen in established tanks.

Diet

Primarily photosynthetic through its zooxanthellae. It feeds readily — offer mysis, brine, chopped meaty seafoods, or pellet/reef foods one to three times per week onto the extended tentacles to accelerate growth and intensify color.

Behavior & temperament

A colony is a single organism, but frogspawn is aggressive to its neighbours: it sends out long, stinging sweeper tentacles (mainly at night) that can damage corals several inches away. Provide 4-6 in of buffer space from non-Euphyllia corals. It generally coexists with same-species frogspawn, but mixing different Euphyllia species — particularly torch with hammer/frogspawn — can result in lethal stinging or disease transmission, so spacing them apart is the safe default.

Health

Among the more resilient Euphyllia, but still vulnerable to brown jelly disease, which can spread rapidly between heads after tissue damage or in poor conditions — isolate, dip, and boost flow immediately. Sensitive to alkalinity swings and chronically poor water quality; watch for receding tissue, bleaching under excess light, and polyp bailout when stressed.

Tips, DIY & hacks

Acclimate gradually to light, dip new pieces for pests and disease, and respect sweeper-tentacle reach when choosing placement. Frag branching frogspawn by cutting between heads with a bone cutter or saw, leaving skeleton under the tissue, then let it heal in calm, clean water.

Sources

  1. Euphyllia divisa — WoRMS World Register of Marine Species (reference)
  2. Frogspawn Coral Care Guide — Reef Builders (care guide)
  3. Wikipedia: Frogspawn coral (wiki)