Shrimp-Hinomaru

Hinomaru shrimp (Caridina cf. cantonensis), also known as the "Hinomaru" or "Japanese Red Bee Shrimp," is a striking variety of freshwater shrimp. This variety is particularly prized by aquarists for its bold coloration and hardiness in tanks. Below is a description and care guide for Hinomaru shrimp:

Description

• Appearance: The Hinomaru shrimp has a distinctive pattern with a bright red body and a prominent white band that runs across its midsection. The red color may vary in intensity depending on the health and genetics of the shrimp, but the white band is usually consistent. Their vibrant color contrasts beautifully with darker substrates and aquascapes.
• Size: Adult Hinomaru shrimp typically grow to a length of about 1.5 to 2 inches (4-5 cm).
• Lifespan: In optimal conditions, these shrimp can live for 2-3 years.

Care Requirements

1. Tank Setup:

   • Tank Size: A tank of at least 10 gallons (about 40 liters) is recommended for a small colony of Hinomaru shrimp. This size ensures stable water conditions and space for them to roam.
   • Substrate: A fine-gravel or soil-based substrate is ideal for shrimp, as it provides places to graze and hide. Shrimp are constantly scavenging for food, so they will benefit from substrates that encourage biofilm growth.
   • Filtration: A gentle filtration system is key, as strong currents can stress shrimp. A sponge filter is often used to provide mechanical filtration without creating strong water movement.
   • Water Parameters:
     • Temperature: Keep the water temperature between 68°F and 74°F (20°C to 23°C). Sudden temperature fluctuations should be avoided.
     • pH: Slightly acidic to neutral water, around pH 6.5 to 7.5, is best for Hinomaru shrimp.
     • Hardness: Soft to slightly hard water (GH 4-8, KH 0-4) is recommended.
     • TDS: Total Dissolved Solids (TDS) levels between 150-250 ppm are ideal. This can be adjusted depending on the specific needs of your shrimp colony.

2. Feeding:

   • Hinomaru shrimp are omnivores and can feed on a variety of foods, including high-quality shrimp pellets, algae wafers, and blanched vegetables like spinach or zucchini.
   • They will also graze on biofilm, algae, and detritus found on the substrate and surfaces of the tank.
   • Occasional protein-rich foods such as daphnia, brine shrimp, or powdered shrimp food will provide a complete diet.

3. Tankmates:

   • It’s important to choose tankmates that won’t harm or outcompete the shrimp for food. Avoid large or aggressive fish.
   • Good tankmates include peaceful fish such as small tetras, rasboras, and other small shrimp species (e.g., Amano shrimp, Neocaridina shrimp).
   • Shrimp are sensitive to copper-based medications, so be cautious when treating other tank inhabitants.

4. Breeding:

   • Hinomaru shrimp are capable of breeding in a well-maintained aquarium. The female carries fertilized eggs under her abdomen, where they develop into larvae.
   • Shrimp larvae need to be in a brackish environment to develop properly, so it's best to breed them in freshwater without expecting the larvae to survive unless you're prepared to hatch them in a separate brackish tank.

5. Water Maintenance:

   • Regular water changes (20-30% per week) are important to maintain good water quality.
   • Test the water frequently to ensure the parameters are stable. Keep a close eye on ammonia, nitrite, and nitrate levels as shrimp are very sensitive to water quality.

Important Considerations:

• Moulting: Like all shrimp, the Hinomaru will molt as they grow. Make sure to remove any leftover exoskeletons from the tank, as they can decompose and affect water quality.
• Water Stability: Stability is crucial for these shrimp. Avoid sudden changes in temperature, pH, or water hardness, as it can stress the shrimp and lead to health issues.
• Genetics: Breeding for specific traits like the "Hinomaru" coloration can result in offspring with varying patterns. Keep an eye on the genetic diversity of your colony to maintain strong, healthy shrimp.

By providing the appropriate care and stable tank conditions, your Hinomaru shrimp will thrive and showcase their beautiful colors. They make an excellent addition to any shrimp enthusiast's aquarium