What is the taste of spoiled tuna?

Spoiled tuna will have a strong, unpleasant smell that's often described as:

* Fishy: This is a much stronger, more intense fishy smell than fresh tuna.

* Ammonia-like: A pungent, chemical smell.

* Sour: This indicates bacteria are breaking down the fish.

* Rancid: A stale, oily smell.

It may also look:

* Discolored: The flesh might be grey, brown, or even green.

* Slimy: A slimy texture on the surface indicates spoilage.

The most important thing is to avoid eating any tuna that looks or smells off. Even a small amount of spoiled tuna can cause serious food poisoning with symptoms like nausea, vomiting, diarrhea, and abdominal cramps.

If you're unsure about the freshness of tuna, it's better to err on the side of caution and throw it away.