* In biology, a stable is a group of organisms that are all descended from a common ancestor and that occupy a similar ecological niche.
* In chemistry, a stable is a compound that is slow to react or change.
* In economics, a stable is a period of economic growth and stability.
* In the military, a stable is a building where horses are kept.
* In physics, a stable is a particle that is in a state of minimum energy.
So, the difference between sturgeon and stable depends on the context in which the word is used.