*Unlike most standard Abyssal enemies, the PT Imp Group is relatively small and fast. Attacking them with large-caliber guns will not do much damage; smaller guns are recommended to deal normal damage.
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*On 11/20/2015, a tweet revealed a bug that prevented destroyers from being able to hit the PT Imp Groups. As a result the devs readjusted the damage calculations in a live patch update on the same day.
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*The PT Imp Groups are vulnerable to attacks from destroyers, light cruisers, and ships equipped with secondary guns (refer to the [[List of Secondary Guns by stats|List of Secondary Guns]] for more details).