What does it mean when cooked fish is like jelly inside?

When cooked fish is like jelly inside, it typically means one of two things:

1. Overcooked: This is the most common reason. Fish is delicate and cooks very quickly. If overcooked, the proteins in the fish will denature and break down, leading to a soft, jelly-like texture.

2. Poor Quality Fish: Sometimes, fish that is not fresh or has been improperly stored can have a gelatinous texture even when cooked. This is because the breakdown of proteins can occur even before cooking if the fish has been exposed to poor storage conditions.

Here's how to tell the difference:

* Overcooked: The fish will usually be dry and flaky in addition to being jelly-like. The flavor may also be bland or slightly metallic.

* Poor Quality: The fish may have a slightly off smell or a slimy texture even before cooking. The jelly-like texture will be more pronounced and may be accompanied by a fishy odor.

To prevent your fish from being jelly-like:

* Cook fish gently and quickly. Use a meat thermometer to ensure it reaches an internal temperature of 145°F (63°C).

* Don't overcook it. Fish is done when it flakes easily with a fork.

* Buy fresh fish from a reputable source. Look for fish with clear eyes, firm flesh, and a mild, fresh odor.

If you're unsure about the quality of your fish, it's always best to err on the side of caution and discard it.