1964 - East-West Center Scholarship, University of Hawaii.
1978 - Special Citation for Research. Awarded by the University of the Philippines
1978 - Likas- Yaman Award, awarded by the Ministry of Natural Resources, Philippines
1979 - University of the Philippines Alumni Award. Awarded by the University of the Philippines Alumni Association
1982 - Ralph Nubla Professorial Chair in the Natural Sciences and Mathematics
1987 - Recipient, Golden Jubilee Professorial Chair, University of the Philippines
1979 - Listed as Seaweed Culture Expert in the "List of ASEAN Aquaculture Specialist." FAO/UNDP, South China Sea Development and Coordinating Programme, Manila, Philippines. ASEAN 77/FA EgA/Rpt. 3
1987 - Recipient, Achievement Award in the Biological Sciences. The National Science Society (Formerly NRCP)
1987 - Recipient, Outstanding Researcher of the University of the Philippines
1993 - Recipient, President's Award for Outstanding Publication, U.P. at Quezon City. Title: Differences in Biomass Production and Carageenophytes in Northern Bohol, Philippines. Hydrobiologia 247:223'-227.
1994 - Recipient, Elvira O. Tan Memorial Award for Outstanding Research in Marine Fisheries. Title: Differences in Biomass Production and Carageenophytes in Northern Bohol, Philippines. Hydrobiologia 247:223-227.
1995 - Recipient, Second Prize Winner Marinalg International Award for outstanding work made at XIVth International Seaweed Symposium held at Brest, France. Title: Clonal propagation of Eucheuma denticulatum and Kappaphycus alvarezii for Philippine seaweed.farms.
1996 - Recipient, Most Outstanding Researcher of the University of the Philippines. Gawad Chanselor,
1997 - Recipient, 11th Dr. Elv'ra O. Tan Memorial Research Award for Best Published Paper in Marine Fisheries "Studies on the Management of Sargassum (Fucales, Phaeophyta) Bed in Bolinao, Pangasinan, Philippines"
1998 - Recipient, Best Published Book. Gawad Chancellor, U.P. at QUCZOl1City
2006 - Recipient, Outstanding Book Award. Field Guide and Atlas of the Seaweed Resources of the Philippines. National Academy of Science and Technology. Manila Hotel,
2006 - Recipient, Asia Pacific Society of Applied Phycology Plaque of Recognition. In Recognition of His Outstanding Scientific Contribution to the Advancement of the Science of Phycology in the Philippines.