immediately_preceded_by developmental stage Medaka stage 40 Medaka stage 41 2nd fry stage OlatDv:0000440 Zoological Science 11: 825-839 (1994) - Stage 41 2nd fry stage: This period begins after the appearance of jointed rays in the pectoral fins and continues until fin rays appear in the dorsal and anal fins (total length about 5.5 mm). - medaka_ontology