Taxonomy & naming
Otopharynx sp. "Ovatus Likoma" has no describing author, no publication date, and no entry under a validated name in Eschmeyer's Catalog of Fishes. The trade name follows the standard convention for undescribed cichlids allied to a known species: the genus, a reference to Otopharynx ovatus (Trewavas, 1935) — Latin ovatus, "egg-shaped," for its deep, ovate body outline — and a locality qualifier, "Likoma," for Membe Point near Likoma Island, well north of the southern-lake localities where O. ovatus was described and is typically recorded. The genus Otopharynx, raised by Regan in 1920, was diagnosed by Oliver (2018) around a melanic pattern of three discrete dark blotches — a suprapectoral spot, a supra-anal spot, and a spot on the caudal peduncle — a pattern O. ovatus shares with several other described Otopharynx. Whether this Likoma-area population is a genuine northern range extension of O. ovatus or a distinct, closely allied form has not been resolved by any published study, and no authority or date should be attached to it.
Morphology
Detailed morphometrics specific to this population have not been published, but its trade name points to the deep, ovate, laterally compressed body outline that gives O. ovatus its species name, along with the three-blotch melanic pattern — a suprapectoral spot, a supra-anal spot, and a spot on the caudal peduncle — that Michael Oliver used to diagnose the wider Otopharynx genus in his 2018 revision. O. ovatus itself is among the larger members of its genus, reaching roughly 8 in total length; whether this Likoma-area population reaches a comparable size has not been documented. Sexual dichromatism is expected on general Malawi cichlid grounds, with breeding males taking on the metallic blue and yellow tones typical of the Malawi flock while females and non-territorial males remain plainer.
Habitat
The form is recorded from a single point, Membe Point, near Likoma Island — a large Malawian island out in the open lake, well north of the southern-lake localities where O. ovatus is typically documented. O. ovatus itself is described as hovering in midwater over rock or sand rather than resting on the bottom, a position suited to a fish watching for spawning activity below, and this population is presumed to occupy a broadly similar habitat around Likoma's rocky drop-offs, though the precise depth range for this specific form has not been published. Surrounding water follows the general Lake Malawi profile — warm, alkaline, and well-buffered.
Feeding
Otopharynx ovatus is a paedophage, a specialist egg-and-larvae thief that cruises in midwater watching for mouthbrooding females and spawning pairs before darting in to snatch eggs or larvae from them — a habit Konings notes as unusual for the genus, since every other described Otopharynx is understood to forage over the bottom rather than in open water. Otopharynx sp. "Ovatus Likoma" is presumed to share this feeding strategy given its trade-name affinity to ovatus, though no feeding study has been published for this Likoma-area population specifically, and the presumption rests on that affinity rather than direct observation.
Mating
Breeding behaviour has not been documented specifically for this form. As in the wider Lake Malawi haplochromine assemblage, a mature male in nuptial colour is expected to hold a territory or display site and court females with lateral displays and quivering, with the male's anal-fin eggspots mediating fertilisation as the female snaps at them while laying. No locality-specific field account of courtship exists for this form.
Breeding
As in all Lake Malawi haplochromines, reproduction is by maternal mouthbrooding: the female incubates the fertilised eggs in her mouth, fasting throughout, for roughly three weeks before releasing free-swimming fry that she continues to shelter when threatened. There is a certain irony in a lineage built around egg-theft relying, like its own prey, on oral incubation to protect its offspring. Clutch size and brooding duration have not been documented specifically for this form; genus-typical figures suggest a modest clutch of a few dozen eggs.
In the aquarium
Otopharynx sp. "Ovatus Likoma" is a rare fish in the aquarium trade. Its presumed paedophagous habits — inferred from its trade-name affinity to O. ovatus, not directly documented for this population — make it a poor choice for a community breeding tank, since it would be expected to raid the broods of tankmates given the opportunity. A tank should provide a sand-and-rock habitat with generous open swimming space, since this is a fish that, by its ovatus affinity, likely spends much of its time hovering in midwater rather than resting on the bottom. Water chemistry should follow the Lake Malawi standard — alkaline and well-buffered, pH roughly 7.7 to 8.6, temperature 75–82 °F. Diet in captivity should be a carnivorous, protein-rich mix of quality pellets and meaty frozen foods.
Conservation
Otopharynx sp. "Ovatus Likoma" has not been evaluated by the IUCN and, as an undescribed form, has no Red List status of any kind. Its documented range is limited to a single point near Likoma Island; the described O. ovatus itself was assessed Least Concern in 2018, but that assessment does not extend to this distinct, undescribed population. In the absence of a dedicated assessment, caution rather than either alarm or reassurance is the appropriate stance.