L236 Iriri Pleco – Species Profile, Care Standards & Husbandry Requirements
L236 Iriri Pleco – Hypancistrus sp. from the Rio Iriri (Brazil)
The L236 Iriri Pleco (Hypancistrus sp.) is one of the most visually striking members of the Loricariidae family. Known for its high-contrast black-and-white pattern with clean, labyrinth-like lines, the species is often compared to L333 or L66, although L236 typically displays a more symmetrical and refined pattern structure.
Originating from the Rio Iriri, a tributary of the Rio Xingu in Brazil, this species inhabits clear, oxygen-rich waters with strong structure, rocky substrates, and natural crevices.
This profile provides a consolidated overview of the L236’s essential care requirements, environmental needs, feeding strategy, and breeding characteristics.
Quick Facts
| Category | Value |
|---|---|
| Common Name | Iriri Pleco |
| Scientific | Hypancistrus sp. (L236) |
| Origin | Brazil — Rio Iriri |
| Size | up to 12 cm |
| Temperature | 26–30°C |
| pH | 6.0–7.2 |
| Water Hardness | soft to medium |
| Tank Size | from 100 cm length |
| Diet | omnivorous; pellets, frozen foods, vegetables |
| Behaviour | peaceful, bottom-oriented |
| Breeding | cave breeder, well documented |
| Shrimp Compatibility | yes, with sufficient structure |
Natural Habitat & Behavior
In the wild, L236 inhabits clear, flowing sections of the Rio Iriri with:
- rocky formations
- driftwood structures
- narrow crevices
- high oxygen levels
- stable warm temperatures
The species exhibits a calm, reclusive temperament and relies heavily on hiding spots to establish micro-territories without aggression.
Tank Setup & Environmental Requirements
Tank Size
A tank from 100 cm length is recommended for one or two adults. For groups, additional hardscape and hiding areas are essential.
Aquascaping & Structure
A suitable habitat includes:
- fine sand or smooth substrate
- numerous caves (ceramic tubes, pleco caves, stone structures)
- driftwood
- dense hardscape for visual separation
- moderate planting (Anubias, Java fern, Bucephalandra, Cryptocoryne)
- shaded areas for security
L236 is fully plant-safe and benefits from dimmed lighting or floating plants.
Water Conditions
The species thrives in:
- soft to medium-hard water
- pH 6.0–7.2
- high oxygen saturation
- clean, stable water with low nitrate levels
Regular water changes and a high-performance biological filter are essential for long-term health.
Feeding Strategy
The L236 is omnivorous with a preference for protein-rich foods. A balanced feeding routine includes:
- high-quality pleco pellets
- frozen foods (mysis, artemia, blackworms)
- blanched vegetables (zucchini, pumpkin, spinach)
- natural algae growth and biofilm
A varied diet supports healthy growth, strong pattern expression, and stable metabolism.
Sexual Dimorphism
Sex differences are visible in adult animals:
- Males: broader head, pronounced odontodes along the pectoral fins and body
- Females: rounder body shape, especially when carrying eggs
Breeding Hypancistrus sp. L236
Breeding is well documented and follows typical Hypancistrus patterns:
- cave breeding with the male guarding eggs
- requires stable warm water, calm surroundings, and defined cave structures
- conditioning with protein-rich food supports spawning
- fry accept fine powdered foods and crushed tablets
Good husbandry ensures strong, healthy offspring with well-defined patterns.
Final Size & Longevity
L236 reaches up to 12 cm and, with stable conditions and proper nutrition, may live 8–10 years.
Due to its compact body shape and strong coloration, it remains visually impressive even in larger community setups.
Compatibility with Shrimp
The Iriri Pleco is well compatible with dwarf shrimp when the tank structure offers sufficient hiding places.
Juvenile shrimp are typically not threatened, making L236 an excellent choice for planted tanks with shrimp colonies.