I think it is 100 percent
The food chain would most likely collapse slowing, without a producer other animals cannot get the needed nutrients required to survive.
Different types of fish live for different amount of times. For example, Bettas live up to two years, Loaches live u to 10 years, and Goldfish live for a few or many decades. Most of the average fish don't live up as long as they could.
My source: Goggle.com.
I truly hope this helped!
