Linked from
The 13 pages that link to Flipper, each with the reason it gives.
PinnipedRelated: Pinnipeds propel themselves through water with limbs reshaped into flippers.
BasilosaurusRelated: Its forelimbs had become flippers, unlike the vestigial hind limbs.
Beluga whaleRelated: Beluga flippers help steer and maneuver through water and ice.
MosasaurusRelated: Mosasaurus had paddle-shaped limbs that helped maneuver through water.
PhocidaeRelated: True seals propel themselves mainly with their hind flippers.
ArchelonRelated: Its long, powerful front flippers provided propulsion through marine waters.