Endophytic fungi are microorganisms found in plant tissues that are mutually beneficial to the host plant. Benalu Batu (Begonia medicinalis) has been used empirically and shown anticancer activity on breast cancer cells (T47D cells) and cervical cancer cells (HeLa cells). This study aimed to determine the toxicity of endophytic fungal isolates against shrimp larvae (Artemia salina) and the Leth…