found: Bailey, Donna. Dolphins, 1991(DLC)90022110
found: Britannica, viewed July 25, 2023(dolphin, any of the toothed whales belonging to the mammal family Delphinidae (oceanic dolphins) as well as the families Platanistidae and Iniidae, the two that contain the river dolphins)
found: Merriam Webster, viewed July 25, 2023 (dolphin: any of various small marine toothed whales (family Delphinidae) with the snout more or less elongated into a beak and the neck vertebrae partially fused; any of several related chiefly freshwater toothed whales (as of the families Platanistidae and Iniidae))
