User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-184.38.6.81-20121022231350/@comment-3528906-20121023003010

Possibly because other thunder monsters rely on an internal source of electricity, whereas Jinouga relies on an external source of electricity, the thunderbug. Also, the shock trap is made of thunderbugs, so the Jinouga probably assimalates those that are in the trap.