1. The doghead fish has a short and thick body, the skin surface is very smooth, and there is a central slit. It has no pelvic fins, very developed air sacs, and is not very mobile. Some can live in fresh water, and the meat is delicate.

2. Puffer fish have air sacs, which will quickly expand when in danger, taking on a cylindrical shape, with a body length of about 25 to 35cm and a dorsal fin.

3. Doghead fish is not edible, but puffer fish is edible.

4. Puffer fish will inflate into balls and surface when in danger, but doghead fish do not have this ability.

5. Pufferfish can make sounds, but dogfish cannot.

6. Pufferfish is an omnivorous fish, while doghead fish is a carnivorous fish.

Benefits of eating puffer fish:

Puffer fish is a relatively precious seafood with high nutritional value. It is rich in protein, fat, vitamins and other nutrients, and can be healthy. Spleen, diuresis, dispelling rheumatism, promoting blood and water metabolism, improving appetite, regulating spleen and stomach function, relieving fatigue, removing toxins and garbage from the body, and beautifying the skin. Contains unsaturated fatty acids, which can strengthen the brain and improve memory. However, pufferfish is poisonous, and the poisonous parts must be removed when eating pufferfish. This toxin also has medical value and can be refined into analgesics.