Clawitzer, if compared with Kingler, has greater sized pincer which is almost four times its own body than Kinger's big pincer which is almost as big as its own body.
Clawitzer's physical appearance is very much like the Pistol Shrimp(Alpheidae) . It is unknown if it actually shares the ability to reverse claws, in which the smaller pincer will be the nest dominant pincer if the previously larger pincer is in anyway amputated.
Based on its Pokémon Y PokéDex entry, it can creates cavitated(bubbly) water pressure which it can reaches up to 60 knots, on the contrary, pistol shrimps shoots bubbles using their pincer that reaches up to 60 miles per hour instead. Simply put, Clawitzers' bubble-shooting has greater pressure, velocity as well as distance by about 13%.
Clawitzer's name is directly based from its distinctively humongous claw(biologically a pincer) which is almost four times bigger than its body and the word "howitzer", which is a type of heavy artillery cannon which also considerably very large in size. Clawitzer's special claw(pincer) which really looks like a howitzer greatly compliments its name.