Studies were undertaken to find a reliable method to induce spermiation in male spotted scat (Scatophagua argus), a herbivorous, euryhaline teleost which can be readily reared in tropical brackish water fish ponds. Administration of HCG (5 and 10 IU1(1 ), LHRHa ar l 7a-methyltestosterone (MT) alone, or LHRHa pluo MT administered simultaneously, were ineffective treatments for stimulating spermiation. Prolonged administration of MT (15 or 45 days), followed by the administration of LHRHa in a cholesterol-based pelleted implant (35 mg-kg1 ), however, significantly otim,,lated spermiation.