Huntail, the Deep Sea Pokémon. Huntail is the evolved form of Clamperl. It uses its fish shaped tail to entice prey before snapping it up in its large jaws.
– Ash’s Pokedex
Huntail evolves from Clamperl via trade with a DeepSeaTooth. It feels to me that this family is rather filler-ish, with already so many fish-based Water types already. I’m not sure how a clam evolves into a fish or an eel, but Pokemon evolution doesn’t really follow animal evolution anyway. It feels like that the DeepSeaTooth and DeepSeaScale are created just for this family.
Huntail is the counterpart to Gorebyss, the other evolution of Clamperl. Appearance-wise, Huntail looks sort of masculine, with the blue colouring, big teeth, and mohawk, while Gorebyss looks more feminine with the pink colouring and more slender design. Even though both species have 50-50 male to female ratio.
Huntail’s Pokedex entry is one of the ones that mention Pokemon eating other organisms (I assume other Pokemon). Its tail is shaped like Gorebyss’s head, and I guess it uses it to lure prey.
Stat-wise, Huntail has good Attack and Defense and decent Sp Attack. It’s rather slow, but its ability Swift Swim can make up for it in the rain, or useful on a Trick Room team. In Gen V, Clamperl can learn Shell Smash, which makes Huntail more useable. Huntail can also learn Baton Pass (along with some stat boosting moves like Iron Defense (Clamperl) and Barrier (egg move)), so it can potentially pass the stat changes.