As marine invertebrates, scallops lack adaptive immunity and employ innate immunity as the front line and almost the solo defense mechanism to protect them against invaders. Accumulating research achievements demonstrated that exosomes could act as innate immune effectors that contribute to host defense mechanism. To better understand the immune functions of exosomes in Chlamys farreri, proteomics feature of hemocytes from scallops injected with PBS, with normal exosomes and LPS stimulating exosomes, respectively, were generated by TMT analysis, in triplicate.