Difference between By-catch and Bycatch

What is the difference between By-catch and Bycatch?

By-catch as a noun is any fish (or other creatures) that are not targeted as a catch but are unintentionally caught, and often discarded back into the sea. while Bycatch as a noun is any fish other than those targeted as a catch, unintentionally caught during fishing

We hope you now know whether to use By-catch or Bycatch in your sentence.