Let's do some basic horsey addition! A Seahorse is a Horse minus
the hooves and plus
the ability to breathe underwater. A Horse is a Unicorn minus
the horn and plus
being non-imaginary. Therefore, by the Transitive Property of Equine Greatness, a Seahorse is a real-life Unicorn that can hang out with mermaids!
If math doesn't convince you, here's the best part: instead of solving for X, this Seahorse can cuddle for U! By which I mean you! This pastel prince of a pony is as comfy on your bed as he is in the briny deeps!!
15 squishy inches of pythagorean prancing, polyester fiber, ages 3 and up!