5e:Habitat/Underwater
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< Habitat
Underdwater Creatures
76 monsters (not including named individuals)
| Monster | Habitat | Size | Type | Tags | Alignment | HP | CR | Marked | Source |
|---|---|---|---|---|---|---|---|---|---|
| Aboleth | Underdark, Underground, Underwater | Large | Aberration | Lawful Evil | 135 | 10 | Canon | SRD-OGL v5.1 | |
| Deva | Arctic, Coastal, Desert, Feywild, Forest, Grassland, Hill, Mountain, Shadowfell, Swamp, Underground, Underwater | Medium | Celestial | Angel | Lawful Good | 136 | 10 | Canon | SRD-OGL v5.1 |
| Anvilwrought Raptor | Arctic, Coastal, Desert, Forest, Grassland, Hill, Mountain, Swamp, Underground, Underwater, Urban | Tiny | Construct | Anvilwrought | Unaligned | 18 | 1/2 | Canon, Pointer | Mythic Odysseys of Theros |
| Aryn | Coastal, Underwater | Medium | Humanoid | Merfolk, Merfolk Salvager | Neutral | 22 | 1 | Canon, Pointer | Ghosts of Saltmarsh |
| Marine Decapus | Coastal, Underwater | Large | Monstrosity | Decapus | Unaligned | 75 | 4 | Canon, Pointer | Tortle Package |
| Wastrilith | Coastal, Swamp, Underdark, Underground, Underwater | Large | Fiend | Demon | Chaotic Evil | 157 | 13 | Canon, Pointer | Monsters of the Multiverse |
| Plesiosaurus | Coastal, Underwater | Large | Beast | Dinosaur | Unaligned | 68 | 2 | Canon | SRD-OGL v5.1 |
| Gem Greatwyrm | Arctic, Coastal, Desert, Feywild, Forest, Grassland, Hill, Mountain, Shadowfell, Swamp, Underdark, Underground, Underwater | Gargantuan | Dragon | Gem Dragon | Neutral | 507 | 26 | Canon, Pointer | Fizban's Treasury of Dragons |
| Dragon Turtle | Coastal, Underwater | Gargantuan | Dragon | Dragon Turtle | Neutral | 341 | 17 | Canon | SRD-OGL v5.1 |
| Dragon Turtle Overview | Coastal, Underwater | Overview | Dragon, Dragon Turtle | Canon | SRD-OGL v5.1 | ||||
| Ancient Dragon Turtle | Coastal, Underwater | Gargantuan | Dragon | Dragon Turtle | Neutral | 409 | 24 | Canon, Pointer | Fizban's Treasury of Dragons |
| Dragon Turtle Wyrmling | Coastal, Underwater | Large | Dragon | Dragon Turtle | Neutral | 90 | 4 | Canon, Pointer | Fizban's Treasury of Dragons |
| Young Dragon Turtle | Coastal, Underwater | Huge | Dragon | Dragon Turtle | Neutral | 178 | 10 | Canon, Pointer | Fizban's Treasury of Dragons |
| Giant Lightning Eel | Coastal, Underwater | Large | Beast | Eel | Unaligned | 42 | 3 | Canon, Pointer | Tales from the Yawning Portal |
| Giant Sea Eel | Underwater | Large | Beast | Eel | Unaligned | 19 | 1/2 | Canon, Pointer | Ghosts of Saltmarsh |
| Mud Elemental | Coastal, Swamp, Underwater | Large | Elemental | Mud Elemental | Neutral | 114 | 5 | Canon, Pointer | Quests from the Infinite Staircase |
| Water Elemental | Coastal, Swamp, Underwater | Large | Elemental | Water Elemental | Neutral | 114 | 5 | Canon | SRD-OGL v5.1 |
| Leviathan | Coastal, Underwater | Gargantuan | Elemental | Water Elemental, Elder Elemental | Neutral | 328 | 20 | Canon, Pointer | Mordenkainen's Tome of Foes |
| Marid | Coastal, Underwater | Large | Elemental | Water Elemental, Genie | Chaotic Neutral | 229 | 11 | Canon, Pointer | Monster Manual (5e) |
| Storm Giant | Coastal, Underwater | Huge | Giant | Storm Giant | Chaotic Good | 230 | 13 | Canon | SRD-OGL v5.1, SRD-CC v5.1 |
| Sea Hag | Coastal, Feywild, Underwater | Medium | Fey | Hag | Chaotic Evil | 52 | 2 | Canon | Varied, SRD5, MM5 |
| Hippocamp | Coastal, Underwater | Large | Monstrosity | Chaotic Good | 22 | 1/2 | Canon, Pointer | Mythic Odysseys of Theros | |
| Ixitxachitl Overview | Coastal, Underwater | Overview | Aberration, Ixitxachitl | Canon, Pointer | Out of the Abyss | ||||
| Ixitxachitl | Coastal, Underwater | Small | Aberration | Ixitxachitl | Chaotic Evil | 18 | 1/4 | Canon, Pointer | Out of the Abyss |
| Ixitxachitl Cleric | Coastal, Underwater | Small | Aberration | Ixitxachitl, Cleric | Chaotic Evil | 18 | 1/4 | Canon, Pointer | Out of the Abyss |
| Vampiric Ixitxachitl | Coastal, Underwater | Medium | Aberration | Ixitxachitl | Chaotic Evil | 44 | 2 | Canon, Pointer | Out of the Abyss |
| Vampiric Ixitxachitl Cleric | Coastal, Underwater | Medium | Aberration | Ixitxachitl, Cleric | Chaotic Evil | 2 | Canon, Pointer | Out of the Abyss | |
| Jagged Koi Prawn | Underwater | Large | Beast | Unaligned | 16 | 1/2 | Canon, Pointer | Journeys through the Radiant Citadel | |
| Kelpie | Coastal, Underwater | Medium | Plant | Neutral Evil | 67 | 4 | Canon, Pointer | Tales from the Yawning Portal | |
| Fey Kelpie | Coastal, Feywild, Underwater | Medium | Plant | Fey | Neutral Evil | 67 | 4 | Noncanon | Varied |
| Kepmak | Coastal, Underwater | Large | Humanoid | Sahuagin, Sahuagin Baron | Lawful Evil | 76 | 5 | Canon, Pointer | Ghosts of Saltmarsh |
| Koalinth | Coastal, Underwater | Medium | Humanoid | Goblinoid, Hobgoblin, Koalinth | Lawful Evil | 16 | 1/2 | Canon, Pointer | Ghosts of Saltmarsh |
| Koalinth Sergeant | Coastal, Underwater | Medium | Humanoid | Goblinoid, Hobgoblin, Koalinth | Lawful Evil | 33 | 2 | Canon, Pointer | Ghosts of Saltmarsh |
| Kraken Overview | Underwater | Overview | Monstrosity, Titan, Kraken | Canon | Varied, SRD5, MM5, MOoT | ||||
| Kraken | Underwater | Gargantuan | Monstrosity | Titan, Kraken | Chaotic Evil | 472 | 23 | Canon | SRD-OGL v5.1 |
| Kraken | Underwater | Gargantuan | Monstrosity | Titan, Kraken | Chaotic Evil | 472 | 23 | Canon | SRD-OGL v5.1, SRD-CC v5.1 |
| Juvenile Kraken | Underwater | Huge | Monstrosity | Titan, Kraken | Chaotic Evil | 207 | 14 | Canon, Pointer | Ghosts of Saltmarsh |
| Malformed Kraken | Coastal, Underwater | Huge | Monstrosity | Titan, Kraken | Chaotic Evil | 172 | 10 | Canon, Pointer | Tales from the Yawning Portal |
| Kraken Priest | Coastal, Underwater | Medium | Humanoid | any race | any evil alignment | 75 | 5 | Canon, Pointer | Volo's Guide to Monsters |
| Kysh | Coastal, Underwater | Medium | Humanoid | Triton | Lawful Good | 27 | 1 | Canon, Pointer | Ghosts of Saltmarsh |
| Lacedon | Coastal, Shadowfell, Underwater | Medium | Undead | Ghoul, Lacedon | Chaotic Evil | 22 | 1 | Noncanon, User Creation | Rlyehable |
| Deep Lacedon | Coastal, Shadowfell, Underwater | Medium | Undead | Ghoul, Ghast, Lacedon | Chaotic Evil | 36 | 2 | Canon | Varied, SRD5, QftIS |
| Maw of Sekolah | Coastal, Underwater | Huge | Monstrosity | Shark | Neutral Evil | 114 | 7 | Canon, Pointer | Ghosts of Saltmarsh |
| Steam Mephit | Underwater | Small | Elemental | Mephit | Neutral Evil | 21 | 1/4 | Canon | SRD-OGL v5.1 |
| Merfolk Overview | Coastal, Underwater | Overview | Humanoid, Merfolk | Canon | Varied | ||||
| Merfolk | Coastal, Underwater | Medium | Humanoid | Merfolk | Neutral | 11 | 1/8 | Canon | SRD-OGL v5.1 |
| Merfolk Salvager | Coastal, Underwater | Medium | Humanoid | Merfolk, Merfolk Salvager | Neutral | 22 | 1 | Canon, Pointer | Ghosts of Saltmarsh |
| Merrow | Coastal, Underwater | Large | Monstrosity | Merrow | Chaotic Evil | 45 | 2 | Canon | SRD-OGL v5.1 |
| Merrow | Coastal, Underwater | Large | Monstrosity | Merrow | Chaotic Evil | 45 | 2 | Canon | SRD-OGL v5.1 |
| Sea Monkey | Coastal, Underwater | Small | Beast | Monkey | Unaligned | 2 | 1/8 | Noncanon, User Creation | Rlyehable |
| Morkoth | Coastal, Underwater | Medium | Aberration | any alignment | 130 | 11 | Canon, Pointer | Volo's Guide to Monsters | |
| Naiad | Coastal, Feywild, Underwater | Medium | Fey | Nymph | Chaotic Neutral | 31 | 2 | Canon, Pointer | Mythic Odysseys of Theros |
| Nightsea Chil-liren | Coastal, Underwater | Medium | Humanoid | Neutral | 11 | 1/8 | Canon, Pointer | Journeys through the Radiant Citadel | |
| Giant Octopus | Underwater | Large | Beast | Octopus | Unaligned | 52 | 1 | Canon | SRD-OGL v5.1 |
| Quipper | Underwater | Large | Beast | Quipper | Unaligned | 1 | 0 | Canon | SRD-OGL v5.1 |
| Swarm of Quippers | Underwater | Medium | Swarm | Beast, Quipper | Unaligned | 28 | 1 | Canon | SRD-OGL v5.1 |
| Giant Rocktopus | Underground, Underwater | Large | Beast | Octopus | Unaligned | 52 | 1 | Canon, Pointer | Out of the Abyss |
| Sahuagin Overview | Coastal, Underwater | Overview | Humanoid, Sahuagin | Canon | Varied, SRD5, MM5 | ||||
| Sahuagin | Coastal, Underwater | Medium | Humanoid | Sahuagin | Lawful Evil | 22 | 1/2 | Canon | SRD-OGL v5.1 |
| Sahuagin Baron | Coastal, Underwater | Large | Humanoid | Sahuagin, Sahuagin Baron | Lawful Evil | 76 | 5 | Canon, Pointer | Monster Manual (5e) |
| Sahuagin Priestess | Coastal, Underwater | Medium | Humanoid | Sahuagin, Cleric | Lawful Evil | 33 | 2 | Canon, Pointer | Monster Manual (5e) |
| Scrag | Coastal, Underwater | Large | Giant | Troll | Chaotic Evil | 84 | 5 | Canon, Pointer | The Rise of Tiamat |
| Sea Horse | Underwater | Tiny | Beast | Sea Horse | Unaligned | 1 | 0 | Canon | SRD-OGL v5.1 |
| Giant Sea Horse | Underwater | Large | Beast | Sea Horse | Unaligned | 16 | 1/2 | Canon | SRD-OGL v5.1, SRD-CC v5.1 |
| Sea Spawn | Coastal, Underwater | Medium | Humanoid | Neutral Evil | 32 | 1 | Canon, Pointer | Volo's Guide to Monsters | |
| Seklaz | Coastal, Underwater | Large | Humanoid | Sahuagin, Sahuagin Baron | Lawful Evil | 76 | 5 | Canon, Pointer | Ghosts of Saltmarsh |
| Sgothgah | Underdark, Underground, Underwater | Large | Aberration | Aboleth | Lawful Evil | 135 | 10 | Canon | Varied, GoS, SRD5 |
| Shark Overview | Underwater | Overview | Beast, Shark | Noncanon | Varied | ||||
| Hunter Shark | Underwater | Large | Beast | Shark | Unaligned | 45 | 2 | Canon | SRD-OGL v5.1 |
| Reef Shark | Underwater | Medium | Beast | Shark | Unaligned | 22 | 1/2 | Canon | SRD-OGL v5.1, SRD-CC v5.1 |
| Shell Shark | Underwater | Medium | Monstrosity | Shark | Unaligned | 32 | 2 | Canon, Pointer | Ghosts of Saltmarsh |
| Skum | Coastal, Underdark, Underground, Underwater, Urban | Medium | Aberration | Lawful Evil | 93 | 5 | Canon, Pointer | Ghosts of Saltmarsh | |
| Constrictor Snake | Desert, Forest, Swamp, Underwater | Large | Beast | Snake | Unaligned | 13 | 1/4 | Canon | SRD-OGL v5.1 |
| Giant Constrictor Snake | Desert, Forest, Swamp, Underdark, Underground, Underwater | Huge | Beast | Snake | Unaligned | 60 | 2 | Canon | SRD-OGL v5.1 |
| Triton | Underwater | Medium | Humanoid | Triton | Lawful Good | 27 | 1 | Canon, Pointer | Ghosts of Saltmarsh |
| Killer Whale | Underwater | Huge | Beast | Whale | Unaligned | 90 | 3 | Canon | SRD-OGL v5.1 |