World Aquaculture December 2020

48 DECEMBER 2020 • WORLD AQUACULTURE • WWW.WA S.ORG Prophylactic intraperitoneal injection of cobia broodfish with antibiotics. Egg biopsy of a Nassau grouper female broodfish. Large cobia broodstock being cleaned by neon gobies at a cleaning station (PVC pipe grid). Male and female mahi broodfish in a maturation tank at UMEH. Males can naturally spawn daily in captivity whereas females spawn every other day. Mahi-mahi embryos are positively buoyant in full strength seawater until near hatching stages. Mahi-mahi embryo at 22-24 hours after fertilization. First cell divisions (4-cell stage) and early embryos of olive flounder.