Amphilophus xiloaensis Breeding Guide
How to breed the Xiloa cichlid (Amphilophus xiloaensis), a Lake Xiloa crater-lake endemic that breeds as a biparental substrate-spawner among basalt rocks.
Overview
Amphilophus xiloaensis is endemic to Laguna Xiloa, a Nicaraguan crater lake that originated about 6,500 years ago. It is a member of the Midas cichlid species complex and a biparental substrate-spawner. In the lake it breeds in real colonies among basalt stones, with peak breeding in November and December.
Sexing
The sexes cannot be reliably distinguished by colour and markings, and females may even briefly develop a small brow bump. In all cases, however, males are somewhat larger. The species is highly variable, with grey, white, yellow, orange and even red individuals occurring naturally.
Conditioning
The species favours alkaline, hard water with a light addition of salt, reflecting its crater-lake origin. Conditioning a compatible pair on a varied diet within stable, mature water provides the basis for spawning.
Breeding Setup
- Hard, alkaline water; lake water sits around 29 °C with a maintenance range of about 27-30 °C.
- pH around 7.5-8.0.
- Rockwork (basalt-style stones) providing surfaces and crevices, mimicking the natural colonial spawning grounds.
- A large tank, as the species reaches up to 35 cm.
Spawning Behavior & Trigger
Pairs spawn among the basalt stones, often in loose colonies. Brood defence shows role differentiation: the male defends the territory against adult conspecifics while the female defends the brood from predators, a behaviour documented in field studies on Lake Xiloa.
Egg & Fry Care
Clutches are large, reaching up to about 1,000 eggs. Eggs hatch after three days, and the young swim free roughly a week later. Both parents continue to guard the free-swimming fry.
Common Challenges
Maintaining the hard, alkaline conditions of the crater lake and managing aggression in a sufficiently large tank are the main hurdles. The recorded breeding type is substrate-spawner, matching the biparental, rock-colony spawning described by the sources used here.