Black Jellyfish is a monster that players can passively fight with the Guard profession at level 317 and 69 knowledge, requiring a strength 337 Hopeport weapon. Killing a Black Jellyfish takes approximatly 20 seconds, and rewards the player with coins and XP for each kill. Using a stronger Hopeport weapon will result in faster individual kills, but the XP-per-hour and and coins-per-hour remain the same. XP will be reduced by the passive XP Penalty when the player's Guard level is too high.
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