Characodon lateralis
Advanced scientific guide to long‑term care, conservation breeding, and colony management.
Taxonomy & evolutionary context
Characodon lateralis is a high‑altitude goodeid from the Mexican Central Plateau, occurring in a series of isolated springs and short stream sections. Multiple colour forms correspond to distinct, often tiny populations. For conservation breeding, locality and line integrity are critical; mixing forms risks erasing unique evolutionary units.
Native habitat & environmental physiology
Hydrology
- Spring‑fed headwaters and short stream reaches.
- Cool, clear water with strong to moderate flow.
- Rocky and cobble substrates with patches of macrophytes and mosses.
Water chemistry (wild)
- pH 7.4–8.2; GH 12–22 dGH; KH 8–16 dKH.
- Conductivity 450–750 µS/cm.
- Temperature 16–22°C, often cooler at night.
Many native sites are small, fragmented, and vulnerable to abstraction, pollution, and invasive species. Captive conditions should reflect the cool, oxygen‑rich, mineral‑rich nature of these plateau springs.
Optimised captive water parameters
| Parameter | Target range | Rationale |
|---|---|---|
| Temperature | 17–21°C | Reflects cool, high‑altitude springs; reduces chronic stress. |
| pH | 7.4–8.1 | Stable alkaline conditions preferred. |
| GH | 14–22 dGH | Supports osmoregulation and skeletal development. |
| KH | 8–14 dKH | Provides buffering; prevents pH swings. |
| Dissolved oxygen | > 8 mg/L | Critical for this rheophilic, cool‑water species. |
| Flow | Moderate–strong | Encourages natural behaviour and conditioning. |
Sustained temperatures above ~22–23°C should be avoided; they are associated with reduced lifespan, increased disease susceptibility, and poor reproductive performance.
Nutrition & digestive biology
Characodon lateralis is an omnivore with a strong benthic and periphyton‑grazing component. In the wild it consumes algae, biofilm, detritus, and small invertebrates. Captive diets should be fibre‑rich and plant‑forward, with animal protein used for conditioning rather than as a staple.
Daily base diet
- Spirulina or algae‑rich flake.
- High‑fibre, vegetable‑based pellets.
- Algae wafers and blanched greens (spinach, kale, dandelion, courgette).
Conditioning foods
- Live daphnia and small crustaceans.
- Frozen cyclops and mosquito larvae.
- Newly hatched Artemia (1–2× per week).
Avoid
- Daily bloodworm or very rich frozen foods.
- High‑protein carnivore pellets as staples.
- Low‑fibre, highly processed flake diets.
Reproductive biology & breeding protocol
Key traits
- Matrotrophic livebearer with trophotaenia.
- Gestation ~55–70 days (temperature‑dependent).
- Broods typically 5–12 large fry.
- Sexual maturity at ~5–7 months under cool conditions.
Breeding setup
- Colony tank 100–150 L.
- Ratio ~1 male : 3–5 females (or 2M : 6–8F in larger tanks).
- Strong filtration, high oxygenation, and moderate–strong flow.
- Rockwork, caves, and dense planting to break sightlines.
Fry rearing protocol
0–48 hours
- Fry are large and well‑developed at birth.
- No feeding required in first 24–48 hours.
- Maintain DO > 8 mg/L and pristine water quality.
Days 3–14
- Crushed spirulina flake and micro‑pellets 2–3× daily.
- Baby brine shrimp 1–2× daily for growth.
- Daily 20–30% water changes with matched parameters.
Days 14–60
- Introduce algae‑coated stones and vegetable matter.
- Gradually transition to adult omnivorous diet.
- Maintain cool temperatures (17–20°C) and high oxygenation.