Ventralis Cichlid (Featherfin)

Ophthalmotilapia ventralis

The *Ophthalmotilapia ventralis* is the most famous representative of the 'Featherfin Cichlids' group of Tanganyika. The name is due to the incredible and very long ventral fins of the adult male, which extend beyond the tail ending in yellow swellings similar to artificial eggs. Males in breeding dress explode in iridescent shades (cobalt blue, bright turquoise or golden depending on the variant), making them one of the most exotic spectacles in the aquarium. However, their hyperactivity, schooling swimmer behavior, and strict dietary requirements make them fish only for experts.

Family: Cichlidae
Origin: Africa (Endemico del Lago Tanganica, coste rocciose superficiali in acqua aperta)
Tank use: Used in 0 tanks

Temperature

24 °C - 27 °C

8.2 - 9

Water type

Freshwater

Tank level

Zona superiore e media per le femmine in branco; zona inferiore rocciosa per i maschi in parata nupziale.

Adult size

15 cm

Description

Taxonomy and Large Eyes:

The Greek prefix *Ophthalmo-* means "eye". These fish, for their size, possess very large eyes to inspect the substrate plane looking for diatoms even on days when the sun struggles to penetrate the surface turbulence. There are spectacular location varieties such as the *Ventralis Isanga* (totally ice blue) or the *Zongwe* (bright metallic blue).

Care and observations

Aerodynamic Setup:

Being phenomenal swimmers accustomed to the "surf-zone" (rough surface waters of the lake), they require very long lanes uninterrupted by wood or plants. A rock wall behind and large portions of free frontal sand make up the ideal habitat. Males need a flat stone or a mound of sand in a prominent position to "raise the banner" (build the love nest). Strictly cover the aquarium: in their furious aerial chases they jump out easily.

Biology of Egg-Dummies:

The peculiarity of this species, which fascinates ethologists, is linked to the evolution of the ventral fins. The male attracts the female to the nest by vibrating. When the female lays and immediately swallows the eggs for mouthbrooding, the male rubs the yellow terminal lobes of his long pelvic fins (which look exactly like hard-boiled eggs) on the bottom. The female tries to swallow these fake eggs and the male releases sperm, fertilizing the real eggs inside her mouth.

Digestive Sensitivity:

Just like Tropheus, their intestine is a ticking time bomb. Any excess of animal proteins, lack of vegetable algae/Spirulina, or sudden change in water quality will lead to a lethal blockage (Bloat). They must be kept in hard and hyper-oxygenated water.

Fish profile

Temperament: Vivacissimi e nevrotici. Estremamente territoriali tra maschi durante la riproduzione. Un maschio dominante esigerà il possesso visivo di metà vasca, scacciando senza tregua maschi sottomessi e femmine non ricettive.
Diet: Brucatore specializzato (Aufwuchs) / Planctivoro. In natura raschiano la diatomea superficiale dalle rocce e catturano copepodi. In acquario hanno lo stesso rischio di 'bloat' dei Tropheus: la dieta deve essere pesantemente orientata sul vegetale (Spirulina, alghe liofilizzate) con occasionali introduzioni di Mysis. Evitare chironomus e pastoni carnei.
Tank level: Zona superiore e media per le femmine in branco; zona inferiore rocciosa per i maschi in parata nupziale.
Minimum group: 10
Adult size: 15 cm
Minimum tank: 500 L
GH: 12 dGH - 25 dGH
KH: n/a
TDS: n/a
Conductivity: n/a
Sex ratio: 1-2 Maschi per 8-10 Femmine (Colonia Haremica). Troppi maschi o vasche sotto i 2 metri porteranno a stress letale e salti fuori dalla vasca dei sottomessi.
Feeding frequency: Piccole quantità 2-3 volte al giorno.
Bioload: Medio-Alto (nuotatori esplosivi che richiedono filtraggio massiccio)
Flow: Corrente da Moderata a Forte (aiuta a mimare l'azione delle onde in superficie)
Jump risk: Covered tank required
Reproduction: Incubatori orali materni. Il maschio usa le estensioni gialle a spatola delle pinne ventrali per mimare delle uova vere (Egg dummies) sul fondo; la femmina cerca di raccoglierle con la bocca, inghiottendo così lo sperma che feconderà le uova reali che ha appena deposto e raccolto.
Compatibility: Miglior mantenimento in Species Tank. Possono convivere in enormi vasche con *Cyprichromis* (che occupano strati ancora più alti) o *Julidochromis* (che restano confinati tra i crepacci). Da NON inserire mai con Tropheus o grandi Frontosa.

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.