Cherax is a genus of freshwater crayfish, commonly known as Cherax crayfish, which are popular in the aquarium trade and as ornamental species due to their striking colors and interesting behaviors. Here’s a detailed description:

### Physical Characteristics:

- Color: Cherax crayfish come in a variety of colors depending on the species. Common colors include blue, red, green, and brown. Some species and captive-bred varieties can have vivid hues and unique patterns.

- Body Shape: They have a robust, segmented body with a hard exoskeleton. Their body is typically cylindrical and somewhat flattened. They have large claws (chelae) that they use for feeding, defense, and interaction.

- Claws: The claws are generally large and powerful, with some species displaying striking color patterns or textures.

- Eyes: Cherax crayfish have prominent compound eyes that are located on stalks, allowing them a wide field of view.

### Size:

- Adult Size: Depending on the species, Cherax crayfish can range in size from about 3 to 12 inches (7.5 to 30 cm) in total length, including the claws. Some species are smaller, while others, like the Cherax destructor, can grow quite large.

### Habitat:

- Natural Range: Cherax species are native to various regions in Australia, New Guinea, and surrounding islands. They are found in freshwater environments such as rivers, streams, swamps, and lakes.

- Aquarium Life: In captivity, Cherax crayfish thrive in aquariums with ample space, hiding spots, and a well-maintained environment. They prefer a tank with substrate for digging and plenty of rocks or PVC pipes for shelter.

### Diet:

- Feeding: Cherax crayfish are omnivorous scavengers. In the wild, they feed on detritus, plants, insects, and small fish. In captivity, they can be fed a diet of high-quality crayfish pellets, fish food, vegetables (like zucchini and spinach), and occasional live or frozen foods such as worms and shrimp.

### Behavior:

- Social: Cherax crayfish are generally territorial and can be aggressive towards each other, especially if space is limited. It’s often recommended to keep them individually or with ample hiding spaces to reduce conflicts.

- Activity Level: They are nocturnal and tend to be more active during the night. During the day, they may hide or rest in their shelters.

### Lifespan:

- Longevity: Cherax crayfish can live for around 3 to 5 years in captivity, though this can vary depending on the species and care provided.

### Varieties:

- Common Species: Some well-known species in the Cherax genus include:

- Cherax destructor (Commonly known as the "fiddler crab" or "common yabby")

- Cherax quadricarinatus (Known as the "red claw crayfish")

- Cherax sp. (Various ornamental species, including blue and white morphs)

### Importance:

- Aquarium Trade: Cherax crayfish are popular in the aquarium trade for their vibrant colors and intriguing behaviors. They are often kept in specialized tanks where their needs can be met.

- Ecological Impact: In some areas where they have been introduced, Cherax crayfish can become invasive and impact local ecosystems, so care should be taken to prevent them from escaping into non-native environments.

Overall, Cherax crayfish are fascinating and visually appealing creatures that make a great addition to freshwater aquariums, provided their specific needs and territorial nature are properly managed.

CHERAX

1. Popular Varieties:

   • Crystal Red Shrimp (Caridina cf. cantonensis): Known for their striking red and white coloration, these shrimp are a popular choice among aquarists.

   • Bee Shrimp (Caridina cf. cantonensis): Featuring a mix of black and white patterns, Bee Shrimp come in various grades and patterns.

   • Cherry Shrimp (Neocaridina davidi): Available in colors like red, orange, yellow, and blue, Cherry Shrimp are known for their hardiness and vibrant hues.

   • Taiwan Bee Shrimp (Caridina cf. cantonensis): A variety of Bee Shrimp with unique and colorful patterns, often featuring intricate stripes and spots.

2. Physical Characteristics:

   • Color: Freshwater ornamental shrimp come in a variety of colors including red, orange, yellow, blue, and black. Some species exhibit multi-colored patterns and intricate designs.

   • Body Shape: They typically have a slender, elongated body with a hard exoskeleton. The body shape is adapted for their habitat, allowing them to navigate aquatic vegetation and substrate.

   • Claws and Appendages: They have small, delicate claws used for feeding and manipulating food, along with antennae and legs adapted for foraging and movement.

3. Habitat:

   • Natural Range: Many freshwater ornamental shrimp originate from Southeast Asia and other tropical regions, inhabiting clean, slow-moving waters with abundant vegetation.

   • Aquarium Life: In aquariums, they prefer well-planted tanks with plenty of hiding spots and stable water parameters. They thrive in tanks with soft, acidic water and low to moderate lighting.

4. Diet:

   • Feeding: They are omnivorous scavengers, feeding on algae, biofilm, detritus, and specially formulated shrimp pellets. A varied diet is important for their health and coloration.

5. Behavior:

   • Social: Generally peaceful and can be kept in groups. They exhibit interesting behaviors such as foraging and molting.

   • Activity Level: Active foragers, often seen exploring the tank and grazing on algae and detritus.

ORNAMENTAL FRESHWATER SHRIMP