…predators resembling wolves.
When most people think of evolution they picture fish sprouting legs and walking on land. Dolphins don’t give a crap what most people think. They’ve seen land and had legs and decided all that was for sissies. No, the dolphin’s level of badassery was far too great to be restricted by gravity. And since air is basically just an incredibly more boring version of water, the dolphin chose to evolve back into a sea creature and see what chaos it could unleash in the murky depths of the scary, unforgiving ocean.
As you can see from the picture above, all four limbs are still quite visible in the dolphin’s embryonic stage.
More interesting facts about dolphins
It’s not limited to dolphins: ontogeny recapitulates phylogeny.
I am not a big biology guy, but wasnt that theory debunked? no idea.
Maybe the reason the embyros have limbs is for self defense. Afterall they’re armed on porpoise.