Effects of different seaweed diets on growth, digestibility, and ammonia-nitrogen production of the sea cucumber Apostichopus japonicus (Selenka)

► The first study to use ammonia-nitrogen production as an indicator to evaluate feed quality. ► The results will give good suggestion for formulated feed of A. japonicas and for seaweed culture. ► The research showed that L. japonica and U. lactuca are the best choice in sea cucumber culture.