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FishFreshwaterIntermediateSemi aggressive

Red Top Williamsi

Pseudotropheus williamsi

A feisty Malawi cichlid with a vivid orange-red dorsal that demands attention.

Red Top Williamsi
✨AI-generated illustration
Β© Google Gemini 2.5 Flash Image Β· AI-generated

About

The Red Top Williamsi (Pseudotropheus williamsi) is a mbuna cichlid from the rocky shorelines of Lake Malawi, found at scattered locations including Nkhata Bay, Likoma Island, and the southeast arm of the lake. Unlike many rock-dwelling cichlids that forage heavily on aufwuchs, this species spends a notable amount of time feeding in open water, picking off plankton, insect larvae, and other invertebrates as they drift by. While also grazing the biofilm that coats exposed rocks in the shallows. In the wild it hugs the uppermost zone of the rocky habitat, rarely venturing deeper than a couple of meters. Males develop that distinctive fiery orange-red flush along the dorsal fin that gives the fish its common name, contrasting with the blue body patterning typical of the Pseudotropheus group. Like most mbuna, this is not a fish for a passive community setup. Males are territorial and will test tankmates, so a species-appropriate Malawi setup with plenty of rockwork and sight lines broken up is the way to go. It's not a fish for complete beginners, but any keeper comfortable with the mbuna mindset, high hardness, alkaline water, and managing aggression through stocking choices, will find this a rewarding and characterful cichlid.

Frequently asked questions

How big does the Red Top Williamsi get?
The Red Top Williamsi reaches about 4–6.5" as an adult.
What size tank does the Red Top Williamsi need?
A minimum of 55 gallons is recommended for the Red Top Williamsi.
What water parameters does the Red Top Williamsi need?
The Red Top Williamsi does best with a temperature of 75–82Β°F, a pH of 7.8–8.6, hardness around 10–30 dGH.
Is the Red Top Williamsi aggressive?
The Red Top Williamsi is semi-aggressive. It can work in a community with careful tankmate choices and enough space.
What does the Red Top Williamsi eat?
The Red Top Williamsi is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
How long does the Red Top Williamsi live?
With good care, the Red Top Williamsi typically lives 5-8 years.