This work detailed on trace fossil atlas and description, ichnofacies, and the application to interpretation of various depositional environments (brackish-water through fully marine facies). Trace fossils morphology, occurrence, variations and ichnoassociation are compared to other forms from other basins across the world. It is the result of an in-depth research on over 3000 feet of cores from the Miocene reservoirs within the depositional belts of Niger Delta basin. It will be a useful tool for students, experts and academia working either in the Niger Delta basin or in similar siliciclastic reservoirs from other basins of the world.