QUICK STATS

Care Level: Easy to Moderate
Diet: Omnivore
Temperament: Semi-Aggressive / Territorial
Reef-Safe: Yes
Source: Captive Bred / See Options
Approximate Purchase Size: 1.25-2.5"
Approximate Max Size: 5-6"
Recommended Tank Size: 30-55 Gallons or Larger

TOMATO CLOWNFISH

The Tomato Clownfish (Amphiprion frenatus) is a bold, hardy clownfish known for its bright red-orange body and single white vertical bar behind the head. As they mature, Tomato Clownfish often develop deeper red coloration and a stronger, more territorial personality. In other words: cute little tomato at first, spicy marinara with property rights later.

Tomato Clownfish are hardy, reef-safe, and usually very willing to accept prepared aquarium foods. They are a great option for aquarists who want a tougher clownfish with more size and presence than many smaller ocellaris or percula varieties. Multiple care guides describe them as hardy, reef-safe, omnivorous fish, but also note that they can become aggressive or territorial as adults.

This species does not require an anemone to thrive. It may host in one if available, but it may also choose coral, rockwork, tank equipment, or one specific corner that it will defend like it has a tiny clipboard and zoning authority. Tomato Clownfish are commonly associated with Bubble Tip Anemones in aquariums, but an anemone should only be added to a mature, stable tank.

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

AQUARIUM REQUIREMENTS

AQUARIUM SIZE

A minimum tank size of 30 gallons or larger is commonly recommended for a Tomato Clownfish, though 45-55 gallons or larger is more comfortable long term, especially for pairs or community aquariums. Bulk Reef Supply and Top Shelf Aquatics list 30 gallons as a minimum, while other retailers recommend 45-55 gallons due to the species’ larger adult size and territorial behavior.

HABITAT RECOMMENDATIONS

Tomato Clownfish are hardy and adaptable, but they do best in stable aquariums with shelter, swimming space, and a clear territory.

Aquascaping: Provide live rock, caves, and open swimming space. Tomato Clownfish often claim a section of the tank and defend it with unreasonable confidence for something shaped like a swimming pepper.

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 territory formation.

Anemone Hosting: An anemone is not required. If adding one, make sure the aquarium is mature and stable. Bubble Tip Anemones are a common hosting option, but the clownfish may still choose a random corner because clownfish enjoy humiliating planning.

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

WATER PARAMETERS

Tomato Clownfish are hardy once established, but they still do best in clean, stable saltwater conditions. “Hardy” means forgiving, not magically immune to the weekly chemistry crime scene that aquariums sometimes become.

Temperature: 74-80°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 normal reef flow but should have calmer areas where they can rest and establish territory. Retail care listings commonly place Tomato Clownfish in the 72-80°F range, pH around 8.1-8.4, and salinity around 1.020-1.025.

DIET

Tomato Clownfish are omnivores and usually accept a wide variety of frozen, prepared, meaty, and algae-based foods. They are generally eager eaters, which is refreshing in a hobby where some fish act like accepting food requires a written apology.

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 an excellent feeding response from clownfish. Watching a Tomato Clownfish attack food like it owes them money is one of reef keeping’s more reliable little joys.

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

Algae-Based Foods: Spirulina flakes, nori, or mixed omnivore foods can be added occasionally for variety. Tomato Clownfish will eat both meaty and vegetable-based foods.

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 civilization.

COMPATIBILITY

Tomato Clownfish are reef-safe and can be kept with many community saltwater fish, but they are more territorial than many ocellaris and percula clownfish. Tank mate selection matters, especially as they mature.

COMMON TANK MATES

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

Avoid: Other clownfish, very timid fish, tiny passive tank mates, and fish that may be bullied by a territorial Tomato Clownfish. Large predators that may eat them should also be avoided.

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

Coral: Tomato Clownfish are considered reef-safe and should not bother soft corals, LPS, SPS, zoanthids, mushrooms, clams, or anemones. Aquatics Unlimited lists them as reef safe and states they will not bother coral or invertebrates.

BEHAVIORAL NOTES

Temperament: Semi-aggressive and territorial, especially once mature or paired.

Pairing: Can be kept singly or as a pair. Avoid mixing with other clownfish species unless the aquarium is very large and the situation is carefully managed. Most aquariums are better with one clownfish pair, because clownfish diplomacy is mostly biting.

Adult Size: Tomato Clownfish get larger than many common designer ocellaris varieties, with many sources listing adult size around 5 inches, and some listing up to 6 inches. Plan for the adult fish, not just the adorable juvenile currently lying to you with its round little face.

Hosting Behavior: They do not need an anemone, but may host in one if available. They may also adopt coral, rockwork, or aquarium equipment as a substitute host.

Reef Compatibility: Excellent for reef tanks, though they may defend a chosen area or hosting site with impressive disrespect.

Jumping: A tight-fitting lid is recommended. Fish continue to treat open-top aquariums like poorly designed exit interviews.

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.