Kokua Line: Why can’t I catch and release rainbow trout?

Question: Trout fishing opens next month on Kauai. Catch and release is prohibited. Why? Is this to prevent fishers from releasing smaller fish in hopes of catching bigger fish? What about if the fisher wants to do only catch and release? Would that be allowed (i.e. catch seven, release seven and be done with the daily limit)?

See the original article at: Honolulu Star-Advertiser