By Hektor Jorgo
Not every distinctive-looking cichlid in the trade is a separate species or a hybrid — sometimes it's a color morph of a familiar fish, and the white severum is a clean example of exactly that.
Direct Answer: A Color Morph, Not a New Species
The white severum is a captive-bred color morph of Heros severus, the South American severum cichlid, distinguished by its pale white-to-gold body in place of the green base color and reddish patterning seen in wild-type severums. At around 8 inches, it needs a 55+ gallon tank, similar to other medium-large cichlids covered on this site. Temperament is unusually peaceful for a cichlid this size, which is the main reason severums — including the white morph — are commonly paired with discus. Diet is omnivorous with a meaningful plant-matter component.
Color Morph vs. Hybrid: Why the Distinction Matters
It's worth being clear about what "white severum" actually describes, because the aquarium trade uses several different kinds of names for fish:
- A color morph (like the white severum) is generally the same species as the wild-type, selectively bred for a specific color trait — comparable to how many popular aquarium fish have both "normal" and selectively-bred color forms
- A hybrid trade name (like the red tiger motaguense) describes a line bred from multiple species or lineages crossed together, without a single clean species identity
Both are legitimate, well-established parts of the aquarium trade — they just describe different things, and knowing which applies to a given fish helps set accurate expectations about consistency between individuals.
Tank Size and Setup
A 55-gallon tank is a reasonable minimum for an adult white severum (~8 inches), putting it in roughly the same size class as Astatheros robertsoni. Severums appreciate:
- Driftwood and rockwork for cover and territory — see our driftwood cichlid tank guide for general considerations
- Stable water parameters with regular maintenance, the same baseline that matters for sensitive South American cichlids generally
- Open swimming space balanced with some structure, rather than a tank packed wall-to-wall with decor
Why White Severums Get Paired With Discus
Severums have a reputation as one of the more peaceful larger cichlids — they're territorial to a degree, but generally lack the relentless aggression of many Central American cichlid species. This, combined with tolerance for similar water conditions, is why severums (white or wild-type) are frequently recommended as discus tankmates, a pairing discussed from the discus side in our 55-gallon discus tank guide. The size and water-quality considerations in that guide apply just as much to a severum sharing the tank as to a second discus.
Not the Only Severum Color Morph
The white severum isn't the only selectively bred color variant of Heros severus — the red-headed severum takes the opposite approach, keeping a gold or green body while concentrating bold red-orange coloration on the head. Both are color morphs of the same species with identical care needs, so the choice between them comes down entirely to which look you prefer.
Diet: Plant Matter Matters
Like Astatheros robertsoni, white severums have a real plant-eating tendency as part of their natural diet. Practically, this means:
- An omnivore-formulated cichlid pellet as a staple, rather than a high-protein carnivore formula
- Occasional blanched vegetables for variety
- Some protein (frozen or live foods) on a regular but not exclusive basis
- An expectation that live plants may get grazed or uprooted — worth planning around in the aquascape
Quick Reference
- White severum is a captive-bred color morph of Heros severus, not a separate species
- Pale white-to-gold coloration, in contrast to wild-type green/red patterning
- Around 8 inches as an adult — 55+ gallon tank minimum
- One of the more peaceful larger cichlids — commonly kept with discus
- Appreciates driftwood/rockwork and stable water parameters
- Omnivore diet with a real plant-matter component — live plants are at risk
- A color morph (same species, different color) differs from a hybrid trade name
