And what kind are fish legal to spear?
No. It is illegal to fish in any waters of Idaho by archery, spearfishing, snagging, hands, and netting except as permitted.
Archery and spearfishing is permitted only in the taking of bullfrogs and unprotected nongame fish and only in those waters during the season set for the taking of game fish.
Please refer to the General Fishing Information (pages 43-49) of the 2011-2012 Fishing Seasons and Rules.