Lanternfishes are the most abundant species of mesopelagic fish in the ocean, playing an important role in connecting the epipelagic and mesopelagic marine food webs. Due to their global distribution, diel vertical migration, and low trophic position, they may be highly susceptible to ingest microplastics. In this study, Notoscopelus resplendens and Symbolophorus californiensis from the Northwest Pacific Ocean were used to compare and analyze potential interspecific differences in the abundance and physicochemical characteristics of microplastics in their intestines. The results showed that both lanternfish species in Northwest Pacific Ocean exhibited a high detection rate of microplastic pollution. The abundance of microplastics in the intestine of S. californiensis and N. resplendens were （0.83 ±0.90） items/individual [（6.54 ±8.33） items/g] and （1.17 ±1.27） items/individual [（11.33 ±14.06） items/g], respectively. However, no significant difference was found in abundance and size of microplastics detected in S. californiensis and N. resplendens. The shape was primarily composed of fiber （accounting for ≥80.00%）. However, there were variations in the chemical composition of microplastics. Polyethylene terephthalate （PET） accounted for 36.00% and polyacrylamide （PAM） accounted for 24.00% of microplastics found in the intestines of S. californiensis, while cellophane （CP） constituted 54.29% and PET constituted 31.43% of MPs found in the intestines of N. resplendens. The microplastic pollution characteristics of lanternfish species may be influenced by accidental ingestion, nutrient transfer, and the water layers in their habitat. These findings contribute to a better understanding of the current status of microplastic pollution among lanternfish species in the same marine area, providing essential data for further exploration of the ecological effects of microplastics on mesopelagic fish in the ocean.