The number of studies on coral reproduction has increased worldwide; nevertheless, in Colombia only few studies have been conducted, and none from the area of the present study.Colonies of the scleractinian coral species Orbicella annularis, Pseudodiploria strigosa, and Siderastrea siderea were sampled in Isla Fuerte (Bolívar), Colombia, in order to evaluate their gametogenesis and fecundity.Samples were taken from the center and the edge of 3-5 colonies of each species between August and September 2011, and between April and June 2012.Samples were fixed in 10% formaldehyde solution; later, they were decalcified using 10% HCl.Finally, they were conserved in 70% ethanol.Fecundity was calculated by direct observation, and the different stages of development were identified with histological techniques using Toluidin blue stain.Oocytes or spermaries were not found in any samples during stage I. Oocytes from O. annularis were found during July (stages II and III), and August (II-IV), whereas, oocytes from P. strigosa were found during April (II), and July (II-IV).Oocytes from S. siderea were found in all samples.Spermaries from O. annularis were found only during August.Spermaries from P. strigosa were found during April (II and III), and July (II-IV); and from S. siderea during August (II-IV), and September (II-V).O. annularis presented 394,6 oocyte/cm 2 in the center and 20,1 oocyte/cm 2 in the edge during July; whereas P. strigosa presented