Corydoras parallelus, also known as Corydoras sp. C002, is a species of Corydoras catfish known for its distinctive appearance and peaceful nature. The "C" number is often used by hobbyists to identify Corydoras species that are not yet scientifically described or are less common in the aquarium trade. Here's an overview of Corydoras parallelus:

Appearance

• Coloration: Corydoras parallelus has a unique color pattern with a pale to grayish base color and multiple horizontal dark lines or stripes that run along its body. These stripes are often parallel, which is how the species gets its name.
• Size: They typically grow to about 2 to 2.5 inches (5 to 6.5 cm) in length, making them a medium-sized Corydoras.

Behavior and Temperament

• Temperament: Like most Corydoras species, Corydoras parallelus is peaceful and ideal for community aquariums. They are non-aggressive and can be housed with other small, peaceful fish.
• Social Behavior: Corydoras parallelus should be kept in groups of at least 4-6 individuals to promote natural schooling behavior and reduce stress. They are more active and exhibit a wider range of behaviors when kept in groups.

Tank Requirements

• Tank Size: A minimum of a 20-gallon (75 liters) tank is recommended for a small group. Larger tanks are preferable if keeping a larger school or other tank mates.
• Substrate: A soft substrate, like fine sand or smooth gravel, is ideal to prevent damage to their sensitive barbels, which they use for foraging.
• Water Conditions:
  • Temperature: 72-78°F (22-26°C).
  • pH: Slightly acidic to neutral, around 6.0-7.5.
  • Water Hardness: Soft to moderately hard water (2-12 dGH) is preferred.
• Aquascaping: The tank should include plenty of hiding places and shaded areas using plants, driftwood, and rocks. This setup mimics their natural habitat and makes them feel secure.

Diet

• Omnivorous: Corydoras parallelus are omnivores and will eat a variety of foods. They do well on a diet of high-quality sinking pellets or wafers, supplemented with live or frozen foods like bloodworms, brine shrimp, and daphnia. A varied diet helps ensure they receive all necessary nutrients.

Summary

Corydoras parallelus (C002) is a peaceful and visually appealing species that is well-suited for community aquariums. Their distinctive striped pattern and active, social behavior make them an engaging choice for aquarists. To keep them healthy and happy, provide a well-structured environment with appropriate tank mates, maintain good water quality, and feed them a varied diet.