D&D Random Encounters for 5E - Underwater

Encounters might be a meeting with a patrol of guards at an old shrine or a familiar looking for aid. It might be an ambush in the wilderness, a stand-off in the city or a monster in the Underdark.
Encounters underwater bring visions of murky seas, vast reefs and dark depths. They might occur in a kelp bed, an underwater cave or by a long-forgotten shipwreck

tools for - dnd5e encounters underwater

level: terrain: sources: type:

1 Sea Hag

At a bed of seaweed and a patch of enchanted sea anemones (there are several large shells)
They are gathering pretty stones
In a fight they surrender if things go badly
Difficulty... 450 Deadly

1 Killer Whale

At a jagged cliff (by a barren slope)
They are adapted to darkness
In a fight they run away as fast as they can if things go badly
Possibly... during the fight a greater threat is attracted by the fighting
Difficulty... 700 Deadly

1 Merrow

At a jagged cliff (the area is associated with shadow magic)
They are exploring a cave mouth
In a fight they focus on the largest foe
Possibly... they have a pair of Gloves of Swimming and Climbing
Difficulty... 450 Deadly

2 Sahuagin

At a bed of glowing soft coral and a coral-carved chamber (a noticeable current pulls creatures upward)
They are preparing to go to the surface
In a fight they focus on anyone with religious icons
Possibly... they have 1d4 Potions of Healing
Difficulty... 300.0 Hard

5 Steam Mephits
1 Mud Mephit (Monster Manual p.216)

At an area of kelp and a patch of pretty coral (nearby is a patch of bright sea mushrooms)
They are gathering pretty stones
In a fight they focus on foes with ranged weapons
Possibly... during the fight someone slips over and possibly knocks others over too
Difficulty... 600 Deadly