Taxonomy & naming
Protomelas sp. "Steveni Imperial" is not a formally described species. It has no describing author, no year of publication, and no entry in Eschmeyer's Catalog of Fishes. The placeholder name follows the standard convention for Lake Malawi trade forms: the genus Protomelas, the abbreviation "sp." for an unresolved species, and a descriptive tag in quotation marks. "Steveni" appears to echo an early field or dealer identification that was never formalised into a published description — it should not be read as referencing any validly named Protomelas — and "Imperial" is a hobby label for the fish's grand size and colour. Placement in Protomelas rests on general body form, dentition, and its affinity with other large, deep-bodied, non-mbuna Malawi haplochromines in that genus. The form should not be confused with the properly described Protomelas taeniolatus ("Red Empress") or other blue-and-orange Protomelas species; it is distinguished informally by its particular colour combination and by the very broad set of collection points recorded for it. Until a formal taxonomic revision of the genus addresses it, it remains an informal, Konings-recognised trade form.
Morphology
A deep-bodied, laterally compressed haplochromine on the standard Protomelas plan, with a large head and a moderately upturned mouth suited to picking food from sand and rock surfaces. Field and hobby reports place dominant males among the larger Malawi trade haps, commonly cited in the region of 7–8 in TL, with females and subordinate males noticeably smaller — a size that makes this one of the more imposing haplochromines regularly kept in the hobby. Sexual dichromatism is pronounced. Dominant, sexually active males develop a deep, saturated blue across the head and flanks with a broad orange-red band ("cape") running along the back and into the dorsal fin, often extending into the caudal and anal fins — the pattern that gives the form its "Imperial" name. Females and non-territorial males are plain silvery-grey to brown with faint dark blotching, the typical cryptic haplochromine female pattern. Because the form is undescribed, no formally published character separates it from related Protomelas; the working distinction rests on this colour combination together with its very wide recorded distribution.
Habitat
Protomelas sp. "Steveni Imperial" is recorded from an unusually broad span of Lake Malawi shoreline — dozens of localities on the Malawian west and east coasts, the mid-lake islands of Likoma and Chizumulu, and stretches of the Mozambican and Tanzanian shore. That breadth is itself informative: it points to a fish that tolerates, or actively uses, the open sand connecting rocky and intermediate habitats around the lake, unlike the narrowly endemic rock-dwelling mbuna that speciate at single reefs. Its biotope is the classic Protomelas intermediate zone — scattered rock and rubble grading into open sand — at moderate depths, rather than continuous rock or pure open water. Water conditions follow the lake's well-characterised chemistry: warm, hard, and strongly alkaline, with temperatures in the mid-20s Celsius and a pH firmly on the alkaline side of neutral.
Feeding
This is an omnivorous forager rather than a dietary specialist. It picks invertebrates, algae-associated material, and other edible items from sand and rock surfaces in the intermediate habitat it occupies, opportunistically taking whatever is available rather than being restricted to a single food source the way many rock-bound mbuna are. This generalist feeding mode is broadly typical of Protomelas as a genus, which includes species ranging from invertebrate pickers to more specialised feeders, and it likely contributes to the form's unusually wide distribution around the lake, since a flexible diet allows it to persist across a range of habitat types.
Mating
Like other non-mbuna Malawi haplochromines, Protomelas sp. "Steveni Imperial" is understood to be a polygynous, lek-like breeder with no pair bond. Territorial males in full breeding dress establish and defend spawning sites at the rock-sand interface — typically a cleared patch or shallow pit rather than a rock crevice — and display their blue-and-orange colouration to attract passing females. Females are not territorial and move between males' sites to select a partner. Because males hold breeding colour more or less continuously, active leks can be found wherever territorial males are established. The specific details of this form's courtship in the wild have not been separately documented; the pattern described here follows the general template shared by large, sand-associated Protomelas.
Breeding
Protomelas sp. "Steveni Imperial" is a maternal mouthbrooder, as are all Lake Malawi haplochromines. After successful courtship at the male's spawning site, the female lays a small batch of eggs and takes them into her mouth almost immediately; she is drawn to the egg-spot markings on the male's anal fin, and in mouthing at these she takes in sperm that fertilises the clutch she is already carrying. She then broods the eggs and larvae in her mouth for roughly three to four weeks, feeding little or not at all during this period, before releasing free-swimming fry with no further care from either parent. Clutch size has not been documented specifically for this form, but given its larger adult size relative to most Malawi haps, a clutch on the order of several dozen eggs is a reasonable expectation by analogy with similarly sized Protomelas.
In the aquarium
Because dominant males can approach 8 in, this form needs more room than most Malawi cichlids kept in the trade. A tank of at least 71 in in length is a sensible minimum, with a fine sand substrate and generous open floor space alongside rock piles that provide broken sightlines without covering the whole footprint — this fish forages over sand as much as among rock. Water chemistry should mirror Lake Malawi: temperature in the mid-20s Celsius, pH between roughly 7.7 and 8.6, and moderately hard to hard water; prolonged exposure to soft or acidic conditions causes chronic problems in Malawi cichlids.
A single male with several females is the standard arrangement, since a lone male in a bare tank will pursue unreceptive females relentlessly; the extra size of this form makes adequate space and cover even more important than usual. Diet should be varied — a quality cichlid pellet as a staple, supplemented with small invertebrates such as chironomid larvae, brine shrimp, and daphnia, with fatty foods kept to a minimum to avoid predisposing the fish to bloat. Regular partial water changes keep nitrate low in a tank holding a large-bodied cichlid like this one.
Conservation
Protomelas sp. "Steveni Imperial" has not been evaluated by the IUCN, and because it is an undescribed form without a formal scientific name it has no Red List assessment of any kind. That absence reflects its taxonomic status, not a judgement about its safety in the wild. Its very wide recorded distribution across Malawian, Mozambican, and Tanzanian waters suggests it is not confined to a single vulnerable locality the way many narrowly endemic mbuna are, which may make it comparatively resilient to localised pressure. It nonetheless shares the general threats facing Lake Malawi cichlids — ornamental collection, inshore habitat disturbance, and sedimentation — and its true conservation status awaits formal taxonomic study and assessment.