Tropical tuna like skipjack, yellowfin, and bigeye in the Indian Ocean are important for fishing and have been heavily caught for many years. Scientists studied their biology and how they are doing in the ocean. They found that there is not enough information about these tuna across the whole ocean, and that the idea that all the tuna in one area are the same might not be true. More research is needed to make sure we can keep catching these tuna without harming them too much.