Frozen, farm raised but these are as close to wild-caught as you can find for trout. The mountain stream in Idaho is diverted to the farm where they are raised. Please note that they may be more expensive that competitors as the head is removed as well as all the bones. 20 clear-cut butterfly fillets. Head, tail, fins off, bones removed, skin-on. To make truly boneless fillets, we take the added step of trimming the belly flap (removing the pelvic fins and tail), cutting out the dorsal fin and making a "V" cut to remove the pin bones.