Sulfur-Headed Hap Care Guide – Aquarium Setup, Diet & Breeding

The Sulfur-Headed Hap is a striking Lake Malawi cichlid named for the vivid yellow colouring that develops across the head and upper body of mature males. The rest of the male's body is typically blue to blue-grey, with darker markings and iridescent highlights that become more impressive when the fish is displaying. Females and juveniles are much less colourful, usually showing silvery, brownish or grey tones.

This species has the elongated, streamlined shape typical of many Malawi haps, with a pointed head and a relatively large mouth suited to picking prey from the bottom and between rocks. Although it is often sold as a peaceful hap, it remains a territorial cichlid and mature males can be assertive, particularly around spawning sites.

In the wild, Sulfur-Headed Haps inhabit the transition between rocky shorelines and open sandy areas. They use rocks for shelter and territory while foraging across the substrate for small aquatic invertebrates and other edible organisms.

Otopharynx lithobates is a maternal mouthbrooder. Its reproductive behaviour and brilliant adult male colouration make it a popular choice for aquarists who want a colourful Lake Malawi community centred on compatible haplochromine cichlids.

Otopharynx lithobates is endemic to Lake Malawi in East Africa. It occurs around rocky and sandy habitats in the lake, including areas associated with islands and shoreline reefs.

A group should be housed in an aquarium of at least 300 litres, with a footprint around 120 by 45 cm; a larger tank is strongly preferable for a full harem or a mixed Malawi community. Use fine sand or another smooth substrate, arrange limestone or inert rocks into caves and broken sightlines, and leave open areas for swimming and foraging. Strong filtration, high oxygen levels, stable alkaline water and regular maintenance are important, while securely anchoring the rockwork prevents territorial activity from causing collapses.

Males reach up to about 16 cm (6.3 in), while females are usually smaller at approximately 12 cm (4.7 in).

Offer a varied, protein-rich but balanced diet consisting of quality cichlid pellets or granules, supplemented with frozen or live foods such as brine shrimp, mysis shrimp, daphnia and suitably sized insect larvae. Feed modest portions once or twice daily rather than allowing them to gorge. A varied diet is preferable to relying heavily on fatty mammalian foods, which are unsuitable for Malawi cichlids.

Suitable companions include similarly sized, moderately peaceful Lake Malawi haps and peacocks, such as Copadichromis, Placidochromis and Aulonocara species, provided the aquarium is spacious and territories are well arranged. Avoid mixing them with very aggressive mbuna, highly boisterous predators, or fish with a similar appearance that may provoke persistent rivalry. Keeping more than one male generally requires a particularly large aquarium; one male with several females is usually the safer social arrangement.

Sulfur-Headed Haps are maternal mouthbrooders. For the best chance of success, keep one male with several females and provide mature, well-filtered water. Spawning usually takes place over a level area or near rocks, with the female collecting the fertilised eggs in her mouth. She incubates them for around three weeks, releasing fully formed fry that can be raised on newly hatched brine shrimp and finely powdered fry food. Remove the female or provide dense refuge if the young are to be protected from other fish.

Males are larger and develop intense blue or blue-grey body colouration with a conspicuous yellow head and upper-body area. Females remain smaller and comparatively plain, with silvery, grey or brownish coloration and less pronounced patterning.