A recent study has estimated the annual microplastics intake by adult humans based on the presence of microplastics found in the gastrointestinal tracts of 160 fish species.
Fish samples were obtained from Nigerian coastal waters immediately after landing at a community seafood market. The study looked at the occurrence of microplastics and their composition in the guts of the cassava croaker (Pseudotolithus senegalensis), sompat grunt (Pomadasys jubelini), lesser African threadfin (Galeoides decadactylus), Maderian sardinella (Sardinella maderensis), flathead gray mullet (Mugil cephalus), West African ilisha (IlishaAfricana), and blackchin tilapia (Sarotherodon melanotheron).