QUICK STATS

Care Level: Easy to Moderate
Coral Type: LPS / Favia-Style Brain Coral
Scientific Name: Commonly sold as Favia sp., but may be Favites, Dipsastraea, Goniastrea, Coelastrea, or a related closed brain coral
Temperament: Semi-Aggressive
Photosynthetic: Yes
Placement: Lower to Middle / Rockwork or Sandbed
Lighting: Low to Moderate
Water Flow: Low to Moderate, Indirect
Approximate Purchase Size: Varies by Frag or Colony Size
Approximate Max Size: Colony Growth Depends on Stability, Feeding, Lighting, Flow, and Available Space

G.I. JOE FAVIA

The G.I. Joe Favia is a colorful LPS brain coral commonly recognized for its bold contrasting patterning. Depending on the individual specimen and lighting, it may show shades of green, army green, lime, red, orange, maroon, yellow, gold, brown, black, teal, or metallic highlights across the eyes, mouths, ridges, and growth edges.

This coral is commonly sold under the trade name Favia, though many corals in the aquarium hobby labeled as favia are technically related brain coral genera rather than true Favia. Possible genera may include Favites, Dipsastraea, Goniastrea, Coelastrea, or similar closed brain coral types. In plain English, it is a favia-style brain coral, because coral taxonomy remains a paperwork swamp with tentacles.

G.I. Joe Favia is popular because it is hardy, colorful, relatively forgiving, and excellent for adding chunky LPS texture to a reef aquarium. It grows as an encrusting or mounding colony with individual corallites that may develop bright contrasting eyes and ridges as it matures.

This coral is photosynthetic and receives much of its energy from reef lighting through symbiotic zooxanthellae. It also benefits strongly from occasional feeding with small meaty foods. Feeding can improve growth, tissue fullness, coloration, and recovery.

G.I. Joe Favia is considered semi-aggressive. It may extend feeding tentacles or sweeper tentacles, especially at night, and can sting nearby corals. Give it space. This coral may look like a harmless little brain button, but at night it becomes a tiny neighborhood dispute with mouths.

Note: Image is a representation of what to expect. The coral you receive may vary slightly in size, color intensity, eye color, ridge color, growth edge, pattern, polyp spacing, and overall appearance.

AQUARIUM REQUIREMENTS

AQUARIUM SIZE

A minimum aquarium size of 10-20 gallons or larger is recommended for G.I. Joe Favia, though larger mature reef systems are preferred. Larger aquariums provide better stability, more placement options, and more room for coral spacing.

Favia-style brain corals can be kept successfully in nano reefs if the system is stable and the coral is given room away from aggressive neighbors. Small tanks make spacing and stability harder, because apparently glass boxes full of stinging animals do not magically create peace.

PLACEMENT RECOMMENDATIONS

G.I. Joe Favia is best placed on lower to middle rockwork or on a stable area of the sandbed where it receives low to moderate light and low to moderate indirect flow.

Lower Placement: Best for new arrivals, stronger lighting systems, or fresh frags.

Middle Placement: Works well once the coral is settled and showing good tissue inflation.

Rockwork: Place on stable rock where the coral can encrust and grow.

Sandbed: Can work well if the coral is mounted securely and not being buried by sand.

Avoid High Light Immediately: Start lower and move gradually if needed.

Spacing: Leave several inches between this coral and neighboring corals.

Sweeper Tentacle Room: Give extra space from sensitive corals and slow-growing LPS.

Avoid Direct Contact: Do not allow it to touch other corals.

Stable Mounting: Make sure the frag plug or colony is secure and cannot fall onto another coral.

Do not wedge it between expensive LPS colonies and call it “efficient use of space.” That is not aquascaping. That is coral trench warfare with better lighting.

WATER PARAMETERS

G.I. Joe Favia does best in clean, stable reef water with moderate nutrients. It is hardy for an LPS coral, but sudden swings in salinity, alkalinity, nutrients, lighting, or flow can cause tissue recession, poor feeding response, faded color, or stress.

Temperature: 75-80°F
pH Level: 8.1-8.4
Salinity: 1.024-1.026 specific gravity
Alkalinity: 8-10 dKH
Calcium: 400-450 ppm
Magnesium: 1250-1350 ppm
Nitrate: 5-15 ppm
Phosphate: 0.03-0.10 ppm

Avoid ultra-low nutrient conditions. Favia-style LPS corals often look better with some available nitrate and phosphate, plus consistent feeding. The goal is stable reef water, not sterile seawater with an identity crisis.

LIGHTING

G.I. Joe Favia prefers low to moderate reef lighting. It can adapt to a range of lighting, but sudden high light can cause bleaching, shrinking, or tissue stress.

LIGHTING RECOMMENDATIONS

Starting PAR: Start around 50-100 PAR when newly added.

Target PAR: Many favia-style brain corals do well around 50-150 PAR.

Higher Light Adaptation: Some specimens may adapt to stronger lighting, but increases should be slow and careful.

Gradual Acclimation: Increase intensity over several days to weeks if moving upward.

Color Display: Green, red, orange, gold, and metallic tones often show best under blue-heavy reef lighting.

Too Much Light: Signs may include bleaching, pale tissue, shrinking, closed feeding tentacles, or tissue recession.

Too Little Light: Signs may include dull color, slow growth, reduced inflation, or poor long-term health.

Do not blast a fresh G.I. Joe Favia with SPS-level lighting because the colors looked spicy. That is not color enhancement. That is how humans turn LEDs into consequences.

WATER FLOW

G.I. Joe Favia prefers low to moderate indirect flow. Flow should keep detritus from settling on the coral without blasting tissue or preventing feeding tentacles from extending.

FLOW RECOMMENDATIONS

Ideal Flow: Low to moderate, indirect, varied flow.

Avoid Direct Blast: Strong direct flow can irritate tissue and prevent feeding.

Prevent Detritus Buildup: Enough flow should move waste off the colony surface.

Feeding Tentacles: Flow should allow tentacles to extend and hold food.

Sandbed Placement: Avoid areas where sand is constantly blown onto the coral.

Tissue Movement: Flesh should gently move, not flap aggressively.

Too little flow lets detritus collect. Too much flow makes the coral sulk. Naturally, the correct answer is the annoying middle ground, because reefkeeping is apparently a hobby built from compromises and expensive water.

DIET

G.I. Joe Favia is photosynthetic but benefits greatly from occasional feeding.

PRIMARY DIET

Photosynthesis: Reef lighting provides much of the coral’s energy.

Mysis Shrimp: Excellent meaty food when chopped small enough.

Brine Shrimp: Useful variety, especially enriched.

Calanus: Good small planktonic food.

Finely Chopped Shrimp: Use very small pieces.

Finely Chopped Clam: Good meaty food if appropriately sized.

LPS Pellets: Small coral pellets may be accepted.

Powdered Coral Foods: Can be used lightly, especially when feeding response is visible.

Broadcast Feeding: The coral may capture small suspended foods from normal reef feeding.

Amino Acids / Reef Nutrition Products: Optional, but may support feeding response and tissue fullness in some systems.

FEEDING FREQUENCY

Feed 1-2 times per week for general care. For faster growth, small feedings up to 2-3 times per week may be beneficial if water quality remains stable.

Feed when the coral’s tentacles are extended, often after lights dim or after a small amount of food is introduced to the water. Turn down flow briefly during feeding if needed.

Do not drop giant chunks of shrimp on it and walk away. It is an LPS coral, not a garbage disposal wearing camouflage.

COMPATIBILITY

G.I. Joe Favia is a good coral for many mixed reefs, but it needs spacing because it can sting neighboring corals.

COMMON TANK MATES

Fish: Reef-safe fish such as clownfish, gobies, blennies, wrasses, tangs, rabbitfish, cardinalfish, anthias, and other peaceful to semi-peaceful fish.

Use Caution: Angelfish, butterflyfish, filefish, puffers, and other fish known to nip LPS corals.

Invertebrates: Generally safe with cleaner shrimp, snails, hermit crabs, and common reef invertebrates.

Coral: Compatible with many soft corals, zoanthids, mushrooms, LPS, and SPS if given enough space.

Avoid Direct Contact: Keep away from aggressive corals with strong stings.

Good Neighbor Strategy: Give it its own area with room to encrust.

CORAL SPACING

Use caution around:

Torches
Hammers
Frogspawn
Galaxea
Chalices
Acans
Lobophyllia
Scolymia
Acanthophyllia
Trachyphyllia
Favias and Favites
Pectinia
Anemones

G.I. Joe Favia can sting nearby corals, and nearby corals can sting it back. Reef tanks are basically tiny glowing neighborhoods where everyone has chemical weapons and no zoning board.

BEHAVIORAL NOTES

Temperament: Semi-aggressive.

Growth Pattern: Encrusting to mounding growth depending on species, frag shape, and placement.

Feeding Tentacles: May extend at night or after food is added to the water.

Sweeper Tentacles: Some favia-style brain corals may extend longer sweepers and sting nearby corals.

Coloration: May show green, red, orange, gold, maroon, yellow, teal, brown, black, or metallic tones depending on lighting and nutrients.

Trade Name Reality: G.I. Joe Favia is a trade-name coral, not a guaranteed scientific species identification.

Taxonomy Note: Many corals sold as “Favia” in the hobby are technically related genera. Care is usually similar, so the trade name remains useful even while taxonomy quietly judges everyone.

Tissue Inflation: Healthy tissue should look full and not tightly receded against the skeleton.

Night Feeding: Feeding response is often strongest after lights dim.

Slow to Moderate Growth: Growth rate depends heavily on feeding, stability, lighting, and available space.

Encrusting Risk: It may grow over nearby rock or plug edges.

Frag Plug Growth: New tissue may slowly spread over the frag plug before expanding onto rockwork.

Stress Signs: Watch for bleaching, tissue recession, exposed skeleton, brown jelly-like decay, shrinking, or loss of feeding response.

Pest Awareness: Inspect for flatworms, nudibranchs, algae, vermetid snails, aiptasia, and other hitchhikers.

Handling: Avoid touching the fleshy tissue. Handle by the plug or skeleton when possible.

Placement Reality: Give it stable light, moderate nutrients, gentle flow, and room to grow. This coral is forgiving, but it is not magical. Nobody is, sadly, though corals at least have the decency to be colorful about it.

ACCLIMATION PROCESS

This acclimation method helps reduce stress by gradually introducing the coral to your aquarium’s temperature, lighting, and water chemistry.

1. DIM THE LIGHTS

Turn down aquarium lights or place the coral in a shaded lower area at first. This helps reduce stress while it adjusts.

2. FLOAT THE BAG

Float the sealed bag in the aquarium for 15-20 minutes to allow the temperature in the bag to equalize with the tank.

3. OPEN BAG, ADD CORAL TO CONTAINER

Carefully open the bag and transfer the coral and shipping water into a clean container. Handle the coral by the frag plug or skeleton when possible.

4. ACCLIMATE USING TANK WATER

Add small amounts of tank water to the container every few minutes for 20-30 minutes, especially if salinity differs between the shipping water and aquarium.

5. CORAL DIP

Use a coral-safe dip according to the product instructions. Inspect carefully for pests, eggs, algae, aiptasia, vermetid snails, tissue damage, and exposed skeleton.

6. TRANSFER CORAL TO AQUARIUM

Place the coral on lower rockwork or the sandbed in low to moderate light and low to moderate indirect flow. Discard shipping and dip water. Do not pour either into your aquarium.

7. LIGHT ACCLIMATE

Start lower in the aquarium and gradually increase light exposure over several days to weeks if needed.

8. GIVE SPACE

Leave several inches between the G.I. Joe Favia and neighboring corals. Watch for nighttime sweeper tentacles.

9. MONITOR FEEDING RESPONSE

After the coral settles, offer very small meaty foods once or twice per week. Feed when tentacles are visible and flow can be reduced briefly.

10. WATCH FOR STRESS

Monitor for tissue recession, bleaching, exposed skeleton, algae on damaged areas, poor inflation, or repeated failure to extend feeding tentacles. Early correction is better than waiting until the coral becomes an expensive camouflage coaster.