# Underwater Encounters (Levels 5—10) *Source: Xanathar's Guide to Everything p. 109* **Underwater Encounters (Levels 5—10)** `dice: [](underwater-encounters-levels-510-xge.md#^underwater-encounters-levels-510)` | dice: d100 | Encounter | |------------|-----------| | 01-02 | `dice:3d6\|noform\|noparens\|avg` (`3d6`) [steam mephits](/Rules/Source/bestiary/elemental/steam-mephit-xmm.md) | | 03-04 | `dice:1d10\|noform\|noparens\|avg` (`1d10`) [sahuagin](/Rules/Source/bestiary/fiend/sahuagin-warrior-xmm.md) | | 05-06 | 1 [giant octopus](/Rules/Source/bestiary/beast/giant-octopus-xmm.md) | | 07-08 | `dice:3d6\|noform\|noparens\|avg` (`3d6`) [constrictor snakes](/Rules/Source/bestiary/beast/constrictor-snake-xmm.md) | | 09-10 | `dice:2d10\|noform\|noparens\|avg` (`2d10`) [merfolk](/Rules/Source/bestiary/elemental/merfolk-skirmisher-xmm.md) with `dice:1d4\|noform\|noparens\|avg` (`1d4`) [giant sea horses](/Rules/Source/bestiary/beast/giant-seahorse-xmm.md) | | 11-15 | `dice:1d4\|noform\|noparens\|avg` (`1d4`) [sea hags](/Rules/Source/bestiary/fey/sea-hag-xmm.md) | | 16-20 | `dice:2d4\|noform\|noparens\|avg` (`2d4`) [swarms of quippers](/Rules/Source/bestiary/beast/swarm-of-piranhas-xmm.md) | | 21-25 | A sunken galleon with a 50% chance of a random treasure hoard inside (roll on the Treasure Hoard: Challenge 5—10 table in chapter 7 of the *Dungeon Master's Guide*) | | 26-30 | `dice:1d4\|noform\|noparens\|avg` (`1d4`) [plesiosauruses](/Rules/Source/bestiary/beast/plesiosaurus-xmm.md) | | 31-35 | `dice:3d6\|noform\|noparens\|avg` (`3d6`) [reef sharks](/Rules/Source/bestiary/beast/reef-shark-xmm.md) | | 36-40 | An abandoned bathysphere | | 41-50 | `dice:1d4\|noform\|noparens\|avg` (`1d4`) [giant constrictor snakes](/Rules/Source/bestiary/beast/giant-constrictor-snake-xmm.md) | | 51-55 | `dice:2d4\|noform\|noparens\|avg` (`2d4`) [hunter sharks](/Rules/Source/bestiary/beast/hunter-shark-xmm.md) | | 56-60 | `dice:1d3\|noform\|noparens\|avg` (`1d3`) [sahuagin priestesses](/Rules/Source/bestiary/fiend/sahuagin-priest-xmm.md) with `dice:2d10\|noform\|noparens\|avg` (`2d10`) [sahuagin](/Rules/Source/bestiary/fiend/sahuagin-warrior-xmm.md) | | 61-65 | An empty castle made from coral | | 66-70 | `dice:1d4\|noform\|noparens\|avg` (`1d4`) [killer whales](/Rules/Source/bestiary/beast/killer-whale-xmm.md) | | 71-75 | `dice:1d10\|noform\|noparens\|avg` (`1d10`) [merrow](/Rules/Source/bestiary/monstrosity/merrow-xmm.md) | | 76-80 | An eerie statue of a squatting humanoid, with bat wings on its back and tentacles sprouting from its face | | 81-85 | `dice:1d4\|noform\|noparens\|avg` (`1d4`) [water elementals](/Rules/Source/bestiary/elemental/water-elemental-xmm.md) | | 86-90 | 1 [sahuagin baron](/Rules/Source/bestiary/fiend/sahuagin-baron-xmm.md) with `dice:2d8\|noform\|noparens\|avg` (`2d8`) [sahuagin](/Rules/Source/bestiary/fiend/sahuagin-warrior-xmm.md) | | 91-96 | `dice:1d4\|noform\|noparens\|avg` (`1d4`) [giant sharks](/Rules/Source/bestiary/beast/giant-shark-xmm.md) | | 97-99 | 1 [marid](/Rules/Source/bestiary/elemental/marid-xmm.md) | | 00 | 1 [storm giant](/Rules/Source/bestiary/giant/storm-giant-xmm.md) | ^underwater-encounters-levels-510