The Amazon river dolphin (Inia geoffrensis) is the world’s largest freshwater dolphin. They range from vaguely normal dolphin-color to bright pink, have a sad little lump on their backs instead of a proper dorsal fin, and grow the bonkersest snouts. They also have the equivalent of owl necks, as far as dolphins go, and they can turn their heads up to 90 degrees. Seriously, this is like Exorcist territory for normal dolpins.
River dolphins kind of need to be able to do it, though, because they hunt for fish in a riverine forest instead of the fucking ocean, and half the time their prey is hiding behind submerged tree roots. Those big flappy boat-paddles they’ve got for flippers help them maneuver around tight obstacles as well. They’re built for agility rather than speed. They also don’t get very big, for dolphins; they’re roughly human sized, with females (the larger sex) sometimes making it to eight feet and 220 pounds. Their eyesight is fucking terrible, because they’re usually hunting in murky-ass water, but they have sensory bristles on their huge pincocchio snouts that help them detect their proximity to prey when they’ve got their muzzles jammed down a hollow log.
They tend toward a solitary existence rather than forming pods like many cetaceans. Calves will stick close by their mothers for some time, but the largest observed groups have consisted only of two adults and two juveniles; once the babies are grown up and ready to leave, they’ll all split up and go their separate ways. This is probably because they’re hiiiiiiiiiiiideous.
Seriously, dolphin, come on.