👉 Actiniism is the study of the actinomycetes, a type of fungus that are found in some sea creatures and other marine environments. Actinomycetes can be found in various species, including sea urchins, clams, mussels, and crabs. They produce diverse structures, including capsules, spores, and hyphae. The study of actiniism is a branch of microbiology that focuses on the identification and classification of fungi.