Sulawesi Harlequin Shrimp (A Few Fascinating Facts)

Sulawesi Harlequin Shrimp Featured Image

The Sulawesi Harlequin Shrimp, scientifically known as Caridina woltereckae, is a colorful freshwater shrimp from Sulawesi, Indonesia.

It’s a unique species that can only be found in Lake Towuti.

This shrimp looks similar to another shrimp called Caridina spongicola, but the Sulawesi Harlequin Shrimp is bigger and has more vibrant colors.

What Threats Do Sulawesi Harlequin Shrimp Face?

The Sulawesi Harlequin Shrimp faces several threats to its survival.

Some of these threats include:

  • Introduced species like the Flowerhorn Cichlid, which can harm the shrimp.
  • Pollution from human activities near the lake.
  • Nickel mining, which can affect the water quality.
  • Uncontrolled harvesting for the aquarium trade, which can reduce the shrimp population.

What Are the Ideal Water Parameters for The Sulawesi Harlequin Shrimp?

To keep these shrimp healthy in an aquarium, it’s important to maintain certain water parameters. These include:

pH7 to 8.5
GH4 to 10
KH3 to 8
Nitrate0 to 20 ppm
Temperature82.4°F to 86°F (28°C to 30°C)

How to Care for Sulawesi Harlequin Shrimp in An Aquarium?

Colony size

Sulawesi Harlequin Shrimp tend to be shy and prefer to be in a group of 20 to 30 shrimp.

Having a large colony helps them feel safe and encourages them to come out of hiding more often.

Water Conditions

It’s essential to keep the water clean with low nitrate levels.

Sulawesi Harlequin Shrimp can thrive in tropical fish tank conditions, especially if the water parameters are similar to those needed for cichlid fish.


Feed the Sulawesi Harlequin Shrimp at least three times a week, offering a variety of foods.

Some examples of good shrimp food include Go Nature shrimp food, plant-based protein foods like seaweed, and protein-based foods to improve growth and breeding rates.

Other Care Tips

  • Don’t keep fish with the shrimp, as they can cause stress or harm to the shrimp.
  • Avoid feeding the shrimp any foods that contain copper, as it can be harmful to them.

You can check out what this invertebrate looks like over here.

Scientific Classification

Scientific Name:Caridina woltereckae
Also Known As:Sulawesi Harlequin Shrimp
Conservation Status:Critically Endangered

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