Crab and watermelon can be eaten together, but in moderation.

Crabs and watermelon can be eaten at the same time, but they are different types of food, so you still need to pay attention to some things when eating them. First, you need to make sure the crabs are properly processed, such as boiling or steaming, to ensure they are safe and edible. Undercooked crab may present health risks, such as bacterial contamination or parasitic infection. So, make sure the crabs are handled properly.

Secondly, crabs and watermelons are different types of food, and their digestive processes are also different. Crab is a source of protein and fat, while watermelon is mostly water and some simple carbohydrates. They may be digested in different times and in different ways, so they may put different burdens on the digestive system when eaten at the same time. This doesn’t mean you can’t eat them together, you just need to be careful to eat them in moderation to avoid discomfort.

How to select high-quality crabs

1. Appearance: Choose crabs with a complete appearance and no obvious damage or breakage. The crab's shell should be smooth and hard, with no cracks or dents.

2. Activity: High-quality crabs should be active, powerful, and show strong responsiveness. Their feet and pincers should move regularly, not in a sluggish or unresponsive state.

3. Weight: Try to choose heavier crabs. Heavier crabs usually mean sufficient meat in the body, and their meat may also be fuller.

4. Gender: Understanding the gender of crabs is also important for selecting high-quality crabs. Male crabs usually grow larger and have plumper meat; while female crabs generally have more eggs and softer meat.