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There are around 30 species of clownfish, but only a handful are commonly kept in home aquariums. Most share the same basic care requirements but differ significantly in size, temperament, anemone compatibility, and suitability for beginners.
Quick Comparison
| Species | Common Name | Adult Size | Temperament | Difficulty |
| A. ocellaris | Ocellaris clownfish | 3.5 inches | Peaceful | Beginner |
| A. percula | Percula clownfish | 3 inches | Peaceful | Beginner |
| P. biaculeatus | Maroon clownfish | 6 inches | Aggressive | Intermediate |
| A. frenatus | Tomato clownfish | 5 inches | Semi-aggressive | Beginner-Intermediate |
| A. clarkii | Clarkii clownfish | 5 inches | Semi-aggressive | Beginner-Intermediate |
| A. melanopus | Cinnamon clownfish | 5 inches | Semi-aggressive | Beginner-Intermediate |
Ocellaris Clownfish (Amphiprion ocellaris)
The ocellaris is the most widely kept marine fish in the world and the recommended starting point for virtually every beginner saltwater keeper. Captive-bred ocellaris are hardy, peaceful, easy to feed, and widely available. Designer morphs including black and white, snowflake, and picasso variants are widely available.
- Adult size: Up to 3.5 inches
- Temperament: Peaceful; may become mildly territorial once paired
- Anemone compatibility: Will host in bubble tip anemones but often ignores anemones entirely
- Best for: Beginners, community reef tanks, nano tanks (single fish)
Percula Clownfish (Amphiprion percula)
Visually similar to the ocellaris and often confused with it in stores. True perculas are slightly smaller with thicker, more defined black banding. Equally hardy and beginner-friendly. The distinction matters little for care purposes.
- Adult size: Up to 3 inches
- Temperament: Peaceful; similar to ocellaris
- Anemone compatibility: Naturally associates with Heteractis magnifica and Stichodactyla gigantea in the wild
- Best for: Beginners, community reef tanks
Maroon Clownfish (Premnas biaculeatus)
The largest and most aggressive clownfish species. Females can reach 6 inches and become highly territorial once paired. Not recommended for community reef tanks with other clownfish or small passive fish. Gold stripe maroon clownfish are a popular variant with yellow stripes. Strong natural association with bubble tip anemones.
- Adult size: Up to 6 inches (females); males 3-4 inches
- Temperament: Aggressive; highly territorial when paired
- Anemone compatibility: Strong association with bubble tip anemones (Entacmaea quadricolor)
- Best for: Experienced keepers, bubble tip anemone setups
Tomato Clownfish (Amphiprion frenatus)
Hardy and bold with a distinctive red-orange body and single white stripe behind the eye. More aggressive than ocellaris or percula. Good for keepers who want a larger, more active clownfish with robust tankmates.
- Adult size: Up to 5 inches
- Temperament: Semi-aggressive; territorial when paired
- Anemone compatibility: Naturally associates with bubble tip anemones
- Best for: Intermediate keepers, larger community tanks
Clarkii Clownfish (Amphiprion clarkii)
One of the most anemone-compatible clownfish species, known to accept a wider variety of host anemones than most clownfish. Hardy and adaptable, though semi-aggressive once established. Best choice for keepers specifically interested in a clownfish-anemone pairing.
- Adult size: Up to 5 inches
- Temperament: Semi-aggressive; manageable in larger tanks
- Anemone compatibility: One of the most anemone-compatible clownfish species, known to accept a wider variety of host anemones than most clownfish
- Best for: Clownfish-anemone setups, intermediate keepers
Ocellaris vs. Percula: Which Should You Choose?
For most beginners the choice comes down to availability and personal preference. Ocellaris are slightly larger and available in a wider range of designer morphs. Percula have slightly thicker black banding. Either makes an excellent first clownfish. Choose whichever captive-bred specimen looks healthiest at your local fish store.
Which Clownfish Should You Start With?
- Best overall for beginners: Ocellaris - hardiest, most peaceful, widest availability
- Alternative beginner choice: Percula - nearly identical care, slightly smaller
- Best for anemone setups: Clarkii - one of the most anemone-compatible species available
- Best for a bold, larger clownfish: Tomato - hardy and active
- Experienced keepers only: Maroon - aggressive, large, requires careful tankmate selection