Cosmos caudatus is known as herb that may improve the health of fish in general. However, the effects of this herb provision in the fish tissue structure has never been studied. To determine any changing of fish tissue that was provided with C. caudatus enriched pellets, a study was conducted in June - August 2024. There was a CRD applied with 4 treatments, namely P0 (control), P1 (10 gr/…