Gorebyss

Being the South Sea Pokemon, Gorebyss lives in southern waters deep in the ocean.  Its pink body becomes more vivid in spring, depending the temperatures.
Gorebyss is a really neat Pokemon.  Sure it looks pretty and graceful or whatever, but there's some other stuff that make it special.  Gorebyss has a high Defense stat, and an even higher base Sp. Attack stat of 114.  Unlike Huntail, you want to keep Gorebyss Specially based.  Gorebyss has fair Attack and Sp. Defense stats.  However, Gorebyss has lacking HP and Speed stats, but in conclusion, Gorebyss has pretty good stats.  What a charming little Pokemon.
Gorebyss can use Baton Pass.  Really great if you have moves like Clamp, Iron Defense, Shell Smash, Amnesia, you get the idea.  You can use Agility, which sharply raises your Speed Stat.  You're a slow Pokemon, so this is a good move, also a good one to combine with Baton Pass.  To match your high Sp. Attack stat, use some good Special moves like Hydro Pump, Psychic, Muddy Water, Water Pulse, Surf, Ice Beam, Hyper Beam; you get the idea.  The move Blizzard has a 100% accuracy in the Hail weather condition.  Use Hail to ensure that Blizzard's strategy gets that much needed boost.  This is a strategy Gorebyss can use.  Gorebyss has a great movepool with a fair amount of good moves to offer.
Gorebyss's ability is Swift Swim.  When it's rainy in battle, Gorebyss will have its Speed stat boosted.  Gorebyss is slow, so this ability is useful, especially if you have Rain Dance.  Combine this ability with the move Agility, and you'll definitely see the Speed boost in action.  A great ability on a Pokemon like Gorebyss.
Like its relative Huntail, Gorebyss has a great ability, great base stats, an amazing movepool, and an astonishing design.  Awesome!