D&D Random Encounters - 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

dnd5e encounters underwater

level: terrain: sources: type:

combatseamonster

1 Killer Whale

At a strange carved underwater cave on a sunken island (nearby is the fresh corpse of an eel)
They are consuming an unusual type of seaweed
In a fight they attack whoever is largest
Possibly... during the fight two combatants lock weapons in melee and become so close they start grappling
Difficulty... 700 Deadly

combat

2 Giant Octopi

At an area of open water (nearby is eerie shell mosaic)
They are bearing symbols of a deity of darkness
In a fight they run away as fast as they can if things go badly
Possibly... they have a Pearl of Power
Difficulty... 600.0 Deadly

combat

7 Merfolk

At a bed of soft coral and a patch of golden seaweed (by an old giant statue)
They are partway through a migration
In a fight they surrender if things go badly
Possibly... they have an Elixir of Health Potion
Difficulty... 437.5 Deadly

combatseamonster

1 Giant Octopus

At a garden of cultivated sea plants surrounded by debris (there is an inscription here in Abyssal)
They are curious about a nearby light source
In a fight they run away as fast as they can if things go badly
Possibly... they have an Elemental Gem water
Difficulty... 200 Medium

combat

3 Giant Sea Horses

At a pile of golden seaweed (a strong current flows through the area)
They are adapted to darkness
In a fight they swarm the most visible foes
Possibly... they have 2d6 holy symbols of various sea deities
Difficulty... 600 Deadly