Vieja melanura Breeding Guide
How to breed Vieja melanura, a large Central American cichlid that spawns biparentally on a cleaned stone or in a cave and guards hundreds of fry.
Overview
Vieja melanura is a large Central American cichlid native to the Peten lake district, the Rio Grijalva-Usumacinta system and adjacent Atlantic-slope waters of Mexico, Belize, Guatemala and Costa Rica. It is a monogamous, biparental substrate-spawner. According to recent DNA work, the fish long known in the hobby as Vieja synspila is now treated as the same species as V. melanura.
Sexing
The species is sexually dimorphic: males grow larger and develop a prominent nuchal hump on the forehead. Sexual maturity is reported from around 10 cm.
Conditioning
A compatible pair is conditioned on a varied diet in stable water. Because the species can be aggressive at breeding time, a generously sized tank with structure is needed before any spawning attempt.
Breeding Setup
- A large tank with rockwork providing flat stones and caves as spawning sites.
- Stable, neutral to slightly alkaline water; the species tolerates brackish conditions up to about 5 ppt in the wild.
- Sand or fine substrate, in keeping with the species' habitat.
- Space for a bonded pair to establish and defend a territory.
Spawning Behavior & Trigger
Spawning occurs on a rock or in a cave after the couple clean and clear the site of detritus. The eggs are laid and fertilised on the polished surface. Pairs are monogamous and strongly territorial during the breeding cycle.
Egg & Fry Care
The species is highly fecund, laying up to about 1,000 eggs per year and producing around 300-500 fry per spawning. Eggs hatch in two to three days and the fry free-swim by about day four; the young can be raised on fine foods or Artemia nauplii. Both parents provide care but may become aggressive toward the fry when ready to spawn again.
Common Challenges
The main challenges are the large tank required and managing aggression, including the parents turning on older fry. The recorded breeding type is substrate-spawner, matching the monogamous, biparental stone-and-cave spawning described by the sources used here. Note the synonymy with Vieja synspila reported by these sources.