and went full marine mode—swapping out legs for flippers

you can even spot remnants of their ancestral origins in their front flippers where there are arm, wrist and finger bones as well as a vestigial pelvic bone

its completely useless today sorta just hangs there like an evolutionary memento lol

dial back to around 50 million years ago this terrestrial wolf-sized mammal called the pakisetus, prowled along the shallow ocean waters where it lived off of primarily fish. 8 million years go by and some of its lineage decided they liked the ocean vibe a bit more so they ditched the land -

orcas are regarded as the apex predators of the sea, the top dogs if you will, but they weren't always cruising the ocean yk...