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Katang: 8 Health Benefits of Freshwater Crab, Description, and Disadvantages

Craving for something unique and delicious to satisfy your taste buds? Look no further than the fascinating world of freshwater crabs! These little critters may not be as popular as their ocean-dwelling cousins, but they pack a punch regarding flavor and health benefits. From their delicate texture to their rich nutritional profile, the benefits of freshwater crabs are truly a hidden gem in the culinary realm. In this blog post, we will dive into the captivating health benefits of freshwater crabs, exploring their description, habitat, disadvantages, and various mouthwatering ways to prepare them.

What is Philippine Freshwater Crab

What makes the Philippine Freshwater Crab, scientifically known as Sundathelphusa Bott, so intriguing? Well, let’s start with its various names. This diminutive crustacean is also called Katang in Tagalog, Kagang in Hiligaynon,  or Kulama in other Filipino dialects. It’s just called freshwater crab in English.

Regarding description and appearance, the freshwater crab boasts a unique and eye-catching physique. It has a round-shaped carapace that measures around 2 to 4 inches in diameter. Its body is adorned with brownish or reddish coloration, while its underside exhibits a pale white hue.

Despite its small size, don’t underestimate the physical characteristics of this little creature! The Philippine freshwater crab has long legs that allow it to swiftly navigate through rocky streams and forested areas it calls home. These agile creatures are equipped with sharp pincers used for capturing prey and defending themselves against predators.

Katang (Tagalog), Kagang or Uyangkas (Hiligaynon/Ilonggo)

When cooked properly, freshwater crab offers a delicate yet distinctive flavor profile that seafood enthusiasts will appreciate. Its succulent meat has hints of sweetness coupled with subtle brininess – truly an exquisite treat for your palate!

As for their habitat preferences, these crabs thrive in clear-flowing rivers and streams nestled within lush tropical forests. They can also hide among rocks or vegetation near the water’s edge. Their natural habitats provide them with food and shelter from potential dangers.

Freshwater Crab Nutrition Per 100g

Nutritional values for freshwater crabs can vary based on factors such as species, diet, and habitat. However, I can provide you with a general idea of the nutritional composition of freshwater crabs per 100 grams. Keep in mind that these values are approximate and can vary:

  • Protein: Around 15-20 grams
  • Fat: Around 1-3 grams
  • Carbohydrates: Minimal, usually less than 1 gram
  • Calories: Approximately 80-100 calories

Freshwater crabs are a good source of lean protein, and they contain small amounts of fat and carbohydrates. The specific nutrient content may differ between different types of freshwater crabs, so it’s advisable to refer to a nutritional database or consult with a nutritionist for more accurate and up-to-date information.

8 Health Benefits of Freshwater Crab

Freshwater crabs can offer several health benefits due to their nutritional content and potential bioactive compounds. Here are some potential health benefits of consuming freshwater crab:

  1. Rich Source of Protein: Freshwater crabs are a good source of high-quality protein, which is essential for building and repairing tissues, supporting immune function, and maintaining muscle mass.
  2. Low in Fat: Freshwater crabs are relatively low in fat, making them a good option for individuals looking to reduce their overall fat intake.
  3. Vitamins and Minerals: Freshwater crabs contain essential vitamins and minerals such as vitamin B12, selenium, zinc, and phosphorus. These nutrients play roles in energy metabolism, immune function, and bone health.
  4. Omega-3 Fatty Acids: While the levels may not be as high as in fatty fish, some freshwater crabs might contain small amounts of omega-3 fatty acids, which are beneficial for heart health and cognitive function.
  5. Chitin and Dietary Fiber: The shell of freshwater crabs is composed of chitin, a type of dietary fiber. Chitin may have potential health benefits, such as supporting digestive health and promoting a feeling of fullness.
  6. Antioxidants: Freshwater crabs may contain antioxidants like selenium and certain vitamins, which can help protect cells from damage caused by oxidative stress.
  7. Iron Content: Some freshwater crabs contain iron, an essential mineral that is important for oxygen transport in the blood and overall energy production.
  8. Low in Carbohydrates: Freshwater crabs are typically low in carbohydrates, making them suitable for low-carb or ketogenic diets.

It’s important to note that the health benefits of freshwater crabs can vary based on factors such as species, habitat, and preparation methods. Additionally, some people may have allergies or sensitivities to shellfish, so it’s important to be cautious if you have any known allergies.

As with any food, moderation and variety are key. Freshwater crabs can be a part of a balanced diet, but it’s important to consider overall dietary choices and consult with a healthcare professional or registered dietitian for personalized advice.

Side Effects and Disadvantages of Freshwater Crab

1. Allergic Reactions: While freshwater crab is generally safe to consume, some individuals may have allergies to shellfish. Allergic reactions can range from mild symptoms like itching and hives to more severe reactions such as difficulty breathing or anaphylaxis. If you have a known shellfish allergy, avoiding consuming freshwater crab is important.

2. High Cholesterol Content: Freshwater crab contains high levels of cholesterol, which can be detrimental for those with existing heart conditions or elevated cholesterol levels. Consuming excessive amounts of cholesterol can contribute to the development of cardiovascular diseases and increase the risk of stroke.

3. Potential Mercury Contamination: Like many other seafood species, freshwater crabs may contain traces of mercury due to environmental pollution. Mercury consumption should be limited as it can accumulate in the body over time and pose health risks, especially for pregnant women and young children.

4. Risk of Bacterial Infections: Improper handling or storage of freshwater crabs can lead to bacterial contamination that may cause food poisoning. It is crucial to ensure thorough cooking and proper hygiene practices when preparing this delicacy.

5. Environmental Impact: Overfishing or unsustainable harvesting practices could negatively impact the population size and overall ecosystem balance where these crabs reside. Both consumers and suppliers need to prioritize sustainable fishing methods that protect aquatic habitats.

While freshwater crab offers numerous health benefits, it’s crucial to consider these potential side effects before adding it regularly into your diet.

How to Eat Freshwater Crab

Freshwater crabs can be enjoyed in a variety of preparations, each offering a unique flavor and texture. Here are some ways you can eat freshwater crab:

  1. Cooked Freshwater Crab:
    • Boiled: Boil the crabs in salted water until they turn red and the meat is cooked. Season with herbs, spices, and sauces as desired.
    • Steamed: Steam the crabs over boiling water until they are fully cooked. Steaming can help retain the natural flavors of the crab meat.
  2. Dried Freshwater Crab:
    • Dried and Seasoned: Clean and prepare the crabs, then sun-dry or oven-dry them until they become crispy. These can be enjoyed as a crunchy snack or added to dishes for flavor and texture.
  3. Canned Freshwater Crab:
    • Canned crab meat is a convenient option for quick meals, such as crab salads, sandwiches, and pasta dishes.
  4. Fermented Freshwater Crab:
    • Fermented crab products are popular in some cultures. The crabs are typically salted and left to ferment for some time, resulting in a distinctive flavor. These can be used in various dishes to add a unique umami taste.
  5. Smoked Freshwater Crab:
    • Smoke the crab meat to infuse it with a smoky flavor. Smoked crab can be used as a topping for salads, and pasta, or as a filling in sandwiches.
  6. Other Preparations:
    • Crab Cakes: Mix crab meat with breadcrumbs, eggs, herbs, and spices, then shape into patties and pan-fry or bake.
    • Crab Stuffed Dishes: Use crab meat as a stuffing for vegetables, mushrooms, or other seafood.
    • Curries and Stews: Incorporate crab meat into flavorful curries, soups, and stews for added protein and taste.
    • Sushi and Sashimi: Use fresh crab meat as a sushi or sashimi topping for a delicate and flavorful option.

Remember to always ensure that the crab is properly cleaned, cooked, and prepared according to food safety guidelines. The specific preparation method you choose will depend on your personal taste preferences and culinary creativity.


Freshwater crab, also known as Katang or Kagang crab, is a unique delicacy that not only tantalizes our taste buds but also offers numerous health benefits. This small and vibrant crustacean is found in the freshwater bodies of the Philippines. Its rich nutritional profile and distinct taste make it a popular choice among seafood enthusiasts.

The nutrition content of freshwater crab per 100g serving is impressive. It provides essential nutrients like protein, omega-3 fatty acids, vitamins (B2, B3), minerals (phosphorus, copper), and antioxidants. These elements contribute to overall well-being by promoting muscle growth and repair, supporting brain function, boosting energy levels, and strengthening the immune system.

The health benefits of consuming freshwater crabs are quite remarkable. Regular intake can improve heart health by reducing bad cholesterol levels and lowering blood pressure. The abundance of omega-3 fatty acids helps reduce inflammation in the body and supports joint health.

Furthermore, the high protein content aids in building lean muscle mass while repairing damaged tissues. Freshwater crabs also contain antioxidants that protect cells from damage caused by free radicals.

Despite its many advantages, there are a few side effects and disadvantages to be aware of when consuming freshwater crab. Those with shellfish allergies should avoid it altogether to prevent any adverse reactions. Additionally, excessive consumption may lead to elevated levels of uric acid for individuals predisposed to gout or kidney problems.

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