Aclose friend of yours announces that she is newly pregnant and wants to go out for a nice seafood dinner to celebrate! you agree, but using your newfound knowledge on ocean pollution, you strongly advise her that in order to protect her baby from birth defects, she should avoid eating

The answer is tuna.

There has been a research  published in Nature  which suggests that common fish foods like tuna, which contain a significant level of methylmercury (MeHg), will have very high  concentrations of the neurotoxin in future decades. MeHg has a high health risks to all humans, and even more serious for fetuses.  Fetuses can experience lifelong nervous system damage from exposure in the womb.

a lot ig i am not sure