They are named Angelfish (Pterophyllum scalare) for a reason. With their long, flowing fins and graceful swimming style, they look like they are gliding through heaven.
They are the classic “Centerpiece Fish.” You put a pair in a planted tank, and it instantly looks classy.
But do not let the name fool you. These are Cichlids. They are related to the aggressive Oscars and Flowerhorns. Underneath those angelic fins lies a predator that will happily eat your Neon Tetras for breakfast.
Here is how to keep them without turning your tank into a war zone.
1. The “Tall Tank” Rule
Angelfish are unique because they grow vertically (up and down), not just horizontally.
- The Problem: A standard 2-foot or 3-foot tank might be long enough, but is it tall enough?
- The Rule: Your tank needs to be at least 18 to 20 inches high. If the tank is too shallow, their long fins will drag on the gravel/sand, leading to injury and fin rot. They need vertical airspace.
2. The “Neon Tetra” Snack
This is the #1 tragedy for beginners.
You have a school of Neon Tetras. You buy a small, cute Angelfish.
Six months later, the Angelfish is the size of a saucer plate, and your Neons are missing.
- Biology: In the wild (Amazon), Angelfish naturally hunt small Tetras. It is their food source.
- The Warning: “If it fits in the mouth, it is food.”
- Safe Tank Mates: Rummy Nose Tetras (too fast), Harlequin Rasboras (too tall), or larger Tetras like Congo Tetras.
3. The “Fin Nipper” Danger
Angelfish can be bullies, but they can also be victims.
Their long flowing fins are tempting targets for “nippy” fish.
- Avoid: Tiger Barbs. A school of Tiger Barbs will shred an Angelfish’s fins in minutes.
- Avoid: Serpae Tetras.
4. Aggression: The Mating War
Angelfish are generally peaceful… until they fall in love.
If you buy a group of 5, two of them might pair off. Once they pair off, they claim a corner of the tank to lay eggs.
God help any fish that swims near that corner.
The parents will attack anything that comes close. If you see two Angelfish cleaning a leaf and chasing everyone else away, you might need to separate them or upgrade to a bigger tank.
5. Varieties in Malaysia
We are lucky to have amazing varieties in our Local Fish Shops (LFS):
- Silver/Zebra: The wild look. Stripes.
- Marble: Black, white, and gold patches.
- Koi Angelfish: Orange, white, and black (looks like a Koi carp).
- Platinum: Solid shining white.
- Altum Angel: The “Holy Grail.” Wild-caught, massive, and very hard to keep. (Experts only).
Angelfish are magnificent. They recognize their owners (often begging for food at the front glass) and add a sense of majesty to any tank.
But they are Semi-Aggressive. They are not the “peaceful community fish” that Guppies are. Give them space, keep them away from bite-sized friends, and they will be the king of your aquarium for 10 years.
