Original sentence: Seasonal Variation:   two studies showed coral trout eating schools of Fusilers in summer, and Scarids during the winter months.The incubation period for coral trout eggs is unknown, but the eggs of related grouper species hatch after 200 to 900 hours
Edited sentence: Seasonal Variation:   One study showed coral trout eating schools of Fusilers in summer, and Scarids during the winter months.The incubation period for coral trout eggs is unknown, but the eggs of related grouper species hatch after 20 to 45 hours