Is this fish suitable for beginners?

Yes, this species is considered beginner-friendly. It has a peaceful, schooling temperament, so anyone with basic marine fishkeeping knowledge should be able to care for it without much difficulty.

Can it be kept with other fish and corals?

Its gentle nature means it's unlikely to harm corals or invertebrates, making it well-suited to reef tanks. It's best to avoid housing it with aggressive or much larger tankmates.

How big does it grow?

It reaches a maximum size of about 6cm. Because it stays so compact, it doesn't require a particularly large tank.

Should I keep more than one?

Since it's a schooling species, keeping several together is recommended. Solitary keeping is possible, but groups of the same species tend to behave more calmly.

What should I feed it?

It readily accepts prepared pellet and frozen foods, making it relatively easy to feed. Since it has a small mouth, choosing smaller-sized food particles will help it eat comfortably.

Orange-lined Cardinalfish

The Orange-lined Cardinalfish is a small, translucent reef fish marked by bold golden-orange stripes running along its body — a striking yet understated addition to any marine aquarium. Native to warm waters as far north as Kanagawa Prefecture in Japan, this peaceful, schooling species gets along well with corals and other tankmates, which is part of why it's so popular. Staying compact at up to 6cm, it doesn't demand a large footprint. One of its most fascinating traits is mouthbrooding: males carry fertilized eggs in their mouths until they hatch, occasionally giving aquarists a chance to witness breeding behavior firsthand. Rated beginner-friendly, it's a great choice for anyone starting out in marine fishkeeping.

View Orange-lined Cardinalfish encyclopedia →

Find Orange-lined Cardinalfish breeders(0)

Limited Time Offer

0% commission on your first sales!Register by September 30, 2026 and your first 2 sales are commission-free!

Breeder Wanted!

List on BreederDirect and sell directly to customers nationwide!

Free registrationNo monthly feesCommission on sales only

BreederDirect's 6 Transparency Promises

Every Marine Fish listing shows Breeder's full disclosure. No wild-caught. Captive-bred priority, tank size guidance, temperament details—transparent aquaculture.

Captive-bred
WYSIWYG
Reef-safe
Care Info Included
Origin Disclosed
Temperament Listed

All species Clownfish Ocellaris Clownfish Percula Clownfish Clark's Anemonefish Tomato Clownfish Saddleback Clownfish Orange Skunk Clownfish Pink Skunk Clownfish Maroon Clownfish Black Ocellaris Clownfish Snowflake Clownfish Picasso Clownfish

Browse all 175 breeds

Filter

Price

Region

Has show resultsChampion titles

Attributes

Captive BredWYSIWYG (Actual photo)

0 items

Sort by

No listings match your filters

Adjust your filters, or get notified when new listings arrive.

Find breeders Browse the Marine Fish encyclopedia Clear filters

Getting alerts is free with a member account. When new listings match your saved search, we'll notify you by email and in-app.

Browse other categories

Dogs Cats Coral Tropical Fish Goldfish Medaka Reptiles & Amphibians Small Pets Birds Insects Exotic Invertebrates

Verified breeders (preview)

森信幸 Breeder

宮城県

朝比奈理一 Breeder

宮城県

Are you raising marine fish?

Apply as a breeder

About Orange-lined Cardinalfish

Orange-lined Cardinalfish: a small, peaceful schooling reef fish with golden stripes, growing to about 6cm. Beginner-friendly and reef-safe.

7 things to know before welcoming a Orange-lined Cardinalfish

1Thrives in Groups
This peaceful, schooling species does best when kept with several of its own kind, letting it display natural behaviors. While it can be kept singly, groups tend to show calmer, more confident behavior with less stress.
2Reef-Safe Choice
Its gentle temperament makes it unlikely to bother corals or invertebrates, which is why it's a popular pick for reef aquariums. That said, avoid pairing it with larger, more aggressive tankmates given its small size.
3Stays Small, Up to 6cm
Reaching a maximum of about 6cm, this species doesn't require a large tank. Still, if you're keeping a group, give them enough open swimming space.
4Mouthbrooding Behavior
Males guard fertilized eggs in their mouths until they hatch, a behavior known as mouthbrooding. Aquarists occasionally get to observe this breeding behavior directly in the home tank.
5Stable Water Quality Matters
Like most marine fish, it's sensitive to sudden shifts in temperature, salinity, and pH. Careful acclimation when introducing the fish, along with consistent water quality maintenance, helps keep it healthy.
6Offer Hiding Spots
This species likes to retreat into shelter, so live rock or coral structures give it places to feel secure. A calm environment with hiding spots helps reduce stress.
7Cycle the Tank First
For a healthy start, make sure your tank has completed its nitrogen cycle and water parameters are stable before adding the fish. It's considered beginner-friendly, but proper preparation still leads to a smoother start.

Frequently asked questions about Orange-lined Cardinalfish

Q.Is this fish suitable for beginners?: A.Yes, this species is considered beginner-friendly. It has a peaceful, schooling temperament, so anyone with basic marine fishkeeping knowledge should be able to care for it without much difficulty.
Q.Can it be kept with other fish and corals?: A.Its gentle nature means it's unlikely to harm corals or invertebrates, making it well-suited to reef tanks. It's best to avoid housing it with aggressive or much larger tankmates.
Q.How big does it grow?: A.It reaches a maximum size of about 6cm. Because it stays so compact, it doesn't require a particularly large tank.
Q.Should I keep more than one?: A.Since it's a schooling species, keeping several together is recommended. Solitary keeping is possible, but groups of the same species tend to behave more calmly.
Q.What should I feed it?: A.It readily accepts prepared pellet and frozen foods, making it relatively easy to feed. Since it has a small mouth, choosing smaller-sized food particles will help it eat comfortably.