Sphaeramia nematoptera – Tiny Cardinal Fish
Perfect for reef tanks, this small, peaceful cardinal fish is ideal for beginner aquarists.
Reef Compatible: Yes
Care Level: Beginner
Disposition: Peaceful
Min. Tank Size: 24 gallons
Mature Size: 3.5 inches
| Feature | Detail |
|---|---|
| Size | 1″ and below (tiny) |
| Species | Sphaeramia nematoptera |
| Compatibility | Reef-safe, peaceful behavior |
FAQ
Is this fish suitable for a reef tank?
Yes, this cardinal fish is reef compatible and does not pose a threat to corals or other invertebrates.
What is the expected mature size of this fish?
The mature size is approximately 3.5 inches, though it typically remains small at 1 inch or below in most setups.
Is this fish aggressive or does it cause stress to other fish?
No, this fish is peaceful and well-suited for community tanks with other non-aggressive species.



Bella Bond –
Easy to care for and very active in the tank. Fits well in a 24-gallon reef setup. Doesn’t eat corals or disturb other fish. A great addition for beginners.
Tim Rampling –
Arrived healthy and stayed active. Peaceful and doesn’t chase other fish. Good size for a small tank. Would recommend to new reef keepers.
Lucas Terry –
Perfect for a small tank. It’s colorful and doesn’t stress other fish. Works well with anemones and soft corals. Very happy in the tank.