QUICK STATS

Care Level: Easy
Diet: Omnivore
Temperament: Peaceful to Semi-Aggressive
Reef-Safe: Yes
Source: Captive Bred / See Options
Approximate Purchase Size: 1.25-2"
Approximate Max Size: 3-4"
Recommended Tank Size: 20 Gallons or Larger

MIDNIGHT CLOWNFISH

The Midnight Clownfish is a striking designer clownfish known for its dark black body, bright orange face and belly, orange fins, and clean white barring. Sea & Reef describes the Midnight as a cross between the black and white Darwin Ocellaris and Onyx Percula clownfish, with juveniles starting more brown-orange and darkening into a deeper black as they mature.

Midnight Clownfish are typically captive-bred, making them hardy, adaptable, and well-suited for aquarium life. They are generally peaceful, reef-safe, and usually strong eaters, which is nice because the hobby already has enough fish that treat dinner like a legal negotiation. Sea & Reef notes their care is very similar to Darwin clownfish and that they can thrive with or without an anemone. 

This clownfish does not require an anemone to thrive. It may host in one if available, but it may also choose coral, rockwork, tank equipment, a back corner, or the single least photogenic spot in the aquarium. Clownfish remain tiny interior designers with deeply questionable taste.

Note: Image is a representation of what to expect. The fish you receive may vary slightly in size, color, pattern, barring, and overall appearance.

AQUARIUM REQUIREMENTS

AQUARIUM SIZE

A minimum tank size of 20 gallons or larger is recommended for a Clownfish. Some retailers list lower minimums for single captive-bred Photon-style clownfish, while larger tanks are better for pairs, community setups, and long-term stability. Bulk Reef Supply lists ORA Photon Clownfish as captive-bred, easy care, reef-safe, with an approximate max size of 4 inches and a recommended tank size of 15 gallons or larger, so 20 gallons gives a more comfortable shop-safe recommendation.

HABITAT RECOMMENDATIONS

Clownfish are hardy and adaptable, making them a strong choice for reef tanks, nano reefs, and peaceful community aquariums.

Aquascaping: Provide live rock, caves, and open swimming space. Clownfish often claim a favorite spot and defend it like they have a tiny mortgage.

Substrate: Sand or fine aragonite works well and helps create a natural reef-style environment.

Rockwork: Live rock is recommended for biological filtration, shelter, and overall aquarium stability.

Anemone Hosting: An anemone is not required. If adding one, make sure the aquarium is mature and stable since anemones are usually less forgiving than clownfish. Captive clownfish are widely kept without host anemones.

Tank Cover: A tight-fitting lid is recommended. Clownfish are not the worst jumpers, but the floor continues its undefeated streak.

WATER PARAMETERS

Clownfish are hardy once established, but they still do best in clean, stable saltwater conditions. “Easy” means forgiving, not magically resistant to whatever chemistry crime occurs in the tank this week.

Temperature: 75-80°F
pH Level: 8.1-8.4
Salinity: 1.020-1.026 specific gravity
Alkalinity: 8-12 dKH
Ammonia, Nitrite, and Nitrate: Ammonia and nitrite should remain undetectable. Nitrate should be kept as low as reasonably possible, ideally below 20 ppm.
Water Flow: Low to moderate flow is ideal. They can handle typical reef flow but should have calmer areas where they can rest and establish territory.

DIET

Clownfish are omnivores and usually accept a wide variety of frozen, prepared, meaty, and algae-based foods. Sea & Reef notes that captive-bred clownfish are conditioned to eat pellets, flakes, frozen mysis shrimp, frozen brine shrimp, and other aquarium diets.

PRIMARY DIET

Frozen Food: Offer mysis shrimp, enriched brine shrimp, marine blends, and finely chopped frozen foods.

Shop Favorite: Our favorite food to offer is Reef Frenzy by LRS because it provides a strong variety of marine ingredients and usually gets a great feeding response from clownfish. Watching a clownfish attack food like it owes them money is one of the hobby’s cleaner joys.

Prepared Foods: High-quality marine pellets or flakes are excellent staple options. Smaller pellet sizes are best for juvenile fish.

Algae-Based Foods: Spirulina flakes or mixed omnivore foods can be added occasionally for variety.

FEEDING FREQUENCY

Feed small amounts 1-2 times per day. Avoid overfeeding, even when the clownfish acts like one missed pellet is the collapse of civilized society.

COMPATIBILITY

Midnight Clownfish are generally peaceful and work well in reef aquariums, especially with other community fish. Like most clownfish, they may become more territorial as they mature, form a pair, or choose a hosting area.

COMMON TANK MATES

Fish: Gobies, blennies, cardinalfish, wrasses, firefish, dwarf angelfish, tangs in larger aquariums, and other peaceful to semi-peaceful community fish.

Avoid: Large predatory fish, very aggressive damsels, large triggers, groupers, lionfish, and fish that may bully or eat them.

Invertebrates: Safe with most cleaner shrimp, hermit crabs, snails, urchins, and other common reef invertebrates.

Coral: Clownfish are considered reef-safe and should not bother soft corals, LPS, SPS, zoanthids, mushrooms, clams, or anemones. Proaquatix notes that clownfish usually ignore reef invertebrates and corals, though they may adopt corals or algae as substitute hosts. 

BEHAVIORAL NOTES

Temperament: Peaceful to semi-aggressive. Usually calm with other fish, but may defend a chosen area once established.

Captive-Bred Advantage: Captive-bred specimens usually adapt well to prepared foods, aquarium conditions, and life without a natural host anemone.

Pairing: Can be kept singly or as a pair. When pairing clownfish, it is usually best to introduce two juveniles or one larger and one smaller individual to reduce fighting.

Designer Coloration: Juveniles may show more brown or orange tones before developing deeper black coloration as they mature. Sea & Reef describes this darkening process in Midnight Clownfish as they grow.

Hosting Behavior: They do not need an anemone, but may host in one if available. They may also host in coral, rockwork, equipment, or the dumbest possible corner of the tank, because clownfish enjoy humbling aquascapers.

Reef Compatibility: Excellent for reef tanks. They are safe with coral and most invertebrates.

Jumping: A tight-fitting lid is recommended. Even captive-bred designer clownfish are still fish, tragically operating with fish-level judgment.

ACCLIMATION PROCESS

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

1. TURN OFF THE LIGHTS & ATO

Turn off aquarium lights to reduce stress. If you have an Auto Top Off system, switch it off before starting acclimation.

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 FISH TO CONTAINER

Carefully open the bag and transfer the fish and shipping water into a clean bucket or container.

4. ACCLIMATE USING TANK WATER

Add 1/4 cup of tank water to the container every 5 minutes for 40 minutes.

5. TRANSFER FISH TO AQUARIUM

Once acclimation is complete, use a net or specimen container to gently transfer the fish into the aquarium. Discard the shipping water. Do not pour shipping water into your aquarium.

6. REFILL THE AQUARIUM WITH SALTWATER

You may need to replace the saltwater removed during acclimation with fresh mixed saltwater.