tadpole stage
Wholly aquatic larval stage in the life cycle of an amphibian, particularly of a frog or toad[WP]. XAO: The stages from feeding to the end of metamorphosis. Encompasses Weisz's first-form tadpole (equivalent to NF stages 45 to 49), second-form tadpole (NF 49 to 56) and third-form tadpole (NF 56 to 60-plus) stages.