How can a poisonous fish be distinguished from an edible fish?

It's not always easy to distinguish a poisonous fish from an edible fish, but here are some general tips to keep in mind:

1. Check the fish's coloration. Some poisonous fish have bright, vibrant colors, while edible fish tend to have more subdued colors. However, not all brightly colored fish are poisonous, so it's important to do further research before consuming any unfamiliar fish.

2. Look at the fish's fins. Some poisonous fish have spines on their fins, while edible fish typically do not. However, some non-poisonous fish also have spines, so this isn't a foolproof method.

3. Examine the fish's eyes. Some poisonous fish have bulging eyes, while edible fish typically have eyes that are more in line with their heads. However, this isn't a reliable way to identify poisonous fish, as some edible fish also have bulging eyes.

4. Check the fish's teeth. Some poisonous fish have sharp, pointed teeth, while edible fish typically have teeth that are more rounded or blunt. However, some non-poisonous fish also have sharp teeth, so this isn't a reliable way to identify poisonous fish.

It's important to note that these tips are not foolproof, and it's always best to consult with a knowledgeable source, such as a marine biologist or a fishmonger, before consuming any unfamiliar fish. If you're ever in doubt, it's best to err on the side of caution and not eat the fish.