Flailtail Snail

Flailtail Snails are large, light blue snails with brownish shells. They presumably get their name from their habit of attacking intruders with a swipe of their tails. They could be found within the dungeons of Hogwarts Castle. They could be combated with a variety of offensive spells, though they showed more resistance to the Knockback Jinx than similar creatures.

Etymology
Flailtail Snails are presumably named such for the rhyming pattern of the three parts of their name.

Appearances

 * Harry Potter and the Prisoner of Azkaban (video game)