If you want to cook a round fish whole, it is essential to remove the bitter-tasting gills and guts.
- Lay the fish on its back and ease open the gill flaps.
- Push the fan of gills out from between the gill flaps; cut them out and throw them away.
- Trim away all the fins with scissors.
- Cut open the fish's belly and ease out the guts.
- Rinse the fish thoroughly, inside and out, under cold running water.