There are 6 states in the south south zone of Nigeria.
They are:
Akwa Ibom: e.g of local dish is ekpang nkwuko

Cross river e.g of local dish is Afang
Bayelsa
Rivers
Delta
Edo
Some cooking tips are:
1) Do not cook beef, chicken, snails, periwinkle, crayfish, stock fish and smoked fish at the same time.
2) Green leaves and corn starch can be used as thickeners in soups.

Are there other south south Nigeria local delicacies not here, check the link >> https://pinchofchel./2018/12/05/south-south-native-dishes-top-best-food-pictures-tips/