Question

What happens when aquatic animals die​

Answer 1

If the Great Dying is our model, the process of environmental degradation wouldn't just mean dead marine fish, but massive die-offs in most of the plants and animals eaten by fish, meaning algae and kelp, along with many plankton, krill, worms, and everything else we tend to lump into "the bottom of the food chain."

Answer 2

Answer:

It will float for a time, until the gases in the body escape, at which point it will begin to sink. However, decomposition processes within the body will release additional gases, so the whale might return to the surface until those gases escape.