A total ban on net fishing in the Kimberley region takes effect today.
Fisheries Minister Gordon Hill says such a ban has been in place every year since 1989.
It remains in force until January 31 each year.
"The closure applies to all netting from Cunningham Point in King Sound to Anna Plains," Mr Hill said.
"This closure is in addition to the year round netting closure which applies between the Northern Territory border and Cunningham Point.
"A netting closure during this period will help protect spawning fish, including Barramundi, during the key breeding season.
"Penalties of up to $750 may apply for any fishers who do not abide by the closure."
Further information about fishing rules can be obtained from the Fisheries Department in Broome on 091 92 1121.