What is the largest impact Dr. Gupta had on Bangladesh? To me, Dr. Gupta’s greatest achievement was certainly the introduction of tilapia. Bangladesh is unique in South Asia in that the Bangladesh government understood the introduction of this species and accepted it. Currently, in the neighbors of Bangladesh, this fish is banned because of misconceptions. But Bangladesh understood the science behind it, as Dr. Gupta explained, and was accepting of this fish. This is the fourth most consumed fish in Bangladesh now.