Is tuna fish still alive when dead?

This is a tricky question that gets at the very definition of "alive."

Here's the breakdown:

* Tuna are definitely dead when they are no longer breathing, their heart has stopped, and their brain function has ceased. This is the biological definition of death.

* However, some cells in the tuna's body might still be functioning for a short time after death. This is called "cellular death" and happens at different rates for different cells. For example, muscle cells can still contract for a while after death, which is why you might see a tuna twitching even though it's dead.

So, is the tuna "alive" in this state? It depends on what you mean by "alive." It's not alive in the sense that it's conscious or able to perform basic life functions. But it's not entirely dead yet either, as some of its cells are still carrying out biological processes.

It's important to remember that death is not a single, instantaneous event, but rather a complex process.