5e Underwater Monsters
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Underwater Monsters, Quality and Featured[edit]
These monsters have been vetted through the Featured Articles or Quality Articles process and are suitable for any normal campaign.
| Name | CR | Speed | Size | Type | Alignment |
|---|---|---|---|---|---|
| Sea Serpent | 18 | 30 ft., swim 80 ft. | Gargantuan | monstrosity | neutral |
| Young Sea Serpent, Variant | 8 | 30 ft., swim 60 ft. | Huge | monstrosity | neutral |
Underwater Monsters[edit]
| Name | CR | Speed | Size | Type | Alignment |
|---|---|---|---|---|---|
| Aberrant Demagogue | 10 | 10 ft. | Large | aberration | lawful evil |
| Adult Pink Dragon | 15 | 40 ft., fly 80 ft., swim 40 ft. | Huge | dragon | lawful evil |
| Akhlut | 4 | 40 ft., swim 60 ft. | Large | monstrosity | unaligned |
| Ammonite | 0 | 0 ft., swim 20 ft. | Tiny | beast | unaligned |
| Ancient Pink Dragon | 22 | 40 ft., fly 80 ft., swim 40 ft. | Gargantuan | dragon | lawful evil |
| Angler | 12 | 30 ft., swim 60 ft. | Large | fiend | lawful neutral |
| Angler Crab | 13 | 40 ft., swim 20 ft. | Gargantuan | beast | unaligned |
| Aqua Dragon | 4 | 10 ft., fly 60 ft. (hover), swim 60 ft. | Small | dragon | neutral good |
| Aquado | 1/2 | 30 ft., swim 30 ft. | Medium | humanoid | chaotic good |
| Aquado Mariner | 7 | 30 ft., swim 30 ft. | Medium | humanoid | chaotic good |
| Aquado Ocean Lord | 11 | 30 ft., swim 30 ft. | Medium | humanoid | chaotic good |
| Aquado Protector | 6 | 30 ft., swim 30 ft. | Medium | humanoid | chaotic good |
| Aquado Sea Warden | 11 | 30 ft., swim 30 ft. | Medium | humanoid | chaotic good |
| Atopodentatus | 1 | 25 ft., swim 50 ft. | Medium | beast | unaligned |
| Auroral Megalops | 10 | 40 ft., swim 20 ft. | Huge | beast | unaligned |
| Behemoustache | 15 | 5 ft., swim 40 ft. | Huge | beast | unaligned |
| Bellowshell | 2 | 20 ft., swim 20 ft. | Large | monstrosity | unaligned |
| Benthid | 6 | 10 ft., swim 60 ft. | Large | beast | neutral |
| Big Octo | 6 | 40 ft., burrow 10 ft., swim 40 ft. | Large | beast | unaligned |
| Bilaruk | 15 | 0 ft., swim 25 ft. | Gargantuan | beast | unaligned |
| Black Carpet | 30 | 20 ft., climb 20 ft., swim 20 ft. | Titanic | ooze | unaligned |
| Blackwater Mephit | 1/4 | 30 ft. | Small | elemental | neutral evil |
| Bloated Zombie | 1 | 20 ft. | Medium | undead | chaotic evil |
| Bloody-Ribboned One | 10 | 30 ft., swim 45 ft. | Medium | monstrosity | lawful evil |
| Blue Whale | 10 | 0 ft., swim 120 ft. | Gargantuan | beast | unaligned |
| Bog Wader | 3 | 30 ft., burrow 30 ft., swim 30 ft. | Medium | humanoid | chaotic neutral |
| Brine Zombie | 1/2 | 20 ft., swim 20 ft. | Medium | undead | neutral evil |
| Brute Zombie | 1 | 20 ft. | Medium | undead | chaotic evil |
| Bull Shark | 3 | 0 ft., swim 40 ft. | Large | monstrosity | unaligned |
| Burrowing Slitherfang | 1/2 | 10 ft., burrow 10 ft. | Small | dragon | unaligned |
| Cachalot | 16 | 0 ft., swim 50 ft. | Gargantuan | beast | unaligned |
| Cavern Lamprey | 2 | 10 ft., climb 10 ft., swim 10 ft. | Huge | beast | unaligned |
| Chill Turtle | 5 | 5 ft., swim 10 ft. | Large | monstrosity | lawful neutral |
| Colossal Octopus | 15 | 20 ft., swim 60 ft. | Gargantuan | beast | unaligned |
| Con Rit | 15 | 5 ft., swim 50 ft. | Gargantuan | monstrosity | unaligned |
| Cursed Gator Guardian | 15 | 20 ft., climb 15 ft., swim 60 ft. | Huge | undead | neutral evil |
| Deep One | 1 | 30 ft., swim 40 ft. | Medium | monstrosity | neutral evil |
| Deep One Behemoth | 9 | 30 ft., swim 40 ft. | Huge | monstrosity | neutral evil |
| Deep One Hybrid | 1/2 | 30 ft., swim 20 ft. | Medium | humanoid | neutral evil |
| Deep One Priest of Dagon | 4 | 30 ft., swim 40 ft. | Medium | monstrosity | neutral evil |
| Deep Python | 4 | 20 ft., burrow 20 ft., swim 80 ft. | Gargantuan | monstrosity | unaligned |
| Deep Tentacle | 1/8 | 5 ft., swim 40 ft. | Medium | undead | unaligned |
| DeepWave Drake | 18 | 40 ft., fly 40 ft., swim 80 ft. | Huge | dragon | neutral |
| DeepWave Dredger | 1/2 | 5 ft. | Medium | beast | unaligned |
| DeepWave Floater | 0 | 0 ft., swim 10 ft. | Tiny | beast | unaligned |
| DeepWave Glider | 7 | 0 ft., swim 60 ft. | Huge | beast | unaligned |
| DeepWave Ice Golem | 4 | 30 ft. | Large | construct | neutral |
| DeepWave Maw | 4 | 30 ft., burrow 20 ft. | Huge | beast | unaligned |
| DeepWave Shrieker | 1/4 | 5 ft. | Small | beast | unaligned |
| DeepWave Skimmer | 1/2 | 0 ft., swim 30 ft. | Large | beast | unaligned |
| DeepWave Snare | 1/4 | 0 ft. | Medium | plant | unaligned |
| DeepWave Stalker | 3 | 10 ft., swim 35 ft. | Medium | beast | unaligned |
| DeepWave Strider | 1/2 | 35 ft. | Large | beast | unaligned |
| Depth Giant | 9 | 30 ft., swim 60 ft. | Huge | giant | neutral |
| Depth Giant Trench Walker | 15 | 40 ft., swim 90 ft. | Huge | giant | neutral |
| Desbreko | 7 | 0 ft., swim 35 ft. | Medium | undead | chaotic evil |
| Dire Crab | 3 | 30 ft., swim 30 ft. | Large | beast | unaligned |
| Dracohybrid Wrecker | 12 | 40 ft., swim 80 ft. | Huge | monstrosity | unaligned |
| Dripper Zombie | 1 | 20 ft. | Medium | undead | chaotic evil |
| Drowner | 1 | 35 ft., swim 35 ft. | Medium | undead | chaotic evil |
| Dunkleosteus | 4 | 0 ft., swim 20 ft. | Huge | beast | unaligned |
| Dunkleosteus, Variant | 2 | 0 ft., swim 50 ft. | Large | beast | unaligned |
| Eel Hound | 2 | 60 ft., swim 40 ft. | Large | beast | unaligned |
| Eel Hydra | 12 | 30 ft., swim 40 ft. | Huge | monstrosity | unaligned |
| Ekhidna | 3 | 10 ft., fly 50 ft., swim 50 ft. | Large | monstrosity | chaotic evil |
| Electroscale Eel | 1 | 0 ft., swim 40 ft. | Small | beast | unaligned |
| Elemental Dragon | 15 | 40 ft., fly 50 ft. | Huge | dragon | chaotic good |
| Esquidna | 20 | 25 ft., swim 60 ft. | Gargantuan | monstrosity | chaotic evil |
| Eurypterid | 5 | 15 ft., swim 15 ft. | Large | beast | unaligned |
| Excremental | 1/2 | 20 ft. | Large | elemental | unaligned |
| Excremini | 1/8 | 15 ft. | Small | elemental | unaligned |
| Experimental Zombie | 3 | 45 ft. | Medium | undead | chaotic evil |
| Eye of the Deep | 7 | 0 ft., swim 20 ft. | Small | aberration | lawful evil |
| Flamer Zombie | 1 | 20 ft. | Medium | undead | chaotic evil |
| Floater Colony | 0 | 0 ft., swim 10 ft. | Gargantuan | beast | unaligned |
| Floater Zombie | 1 | 0 ft., swim 20 ft. | Medium | undead | chaotic evil |
| Foulmonella | 3 | 10 ft., swim 30 ft. | Small | plant | unaligned |
| Funkwe | 17 | 10 ft., burrow 20 ft., swim 60 ft. | Gargantuan | dragon | neutral evil |
| Gaping Jaw | 7 | 0 ft., swim 40 ft. | Gargantuan | fiend | chaotic evil |
| Geozard | 1/2 | 30 ft., swim 50 ft. | Medium | humanoid | any alignment |
| Giant Ammonite | 2 | 0 ft., swim 20 ft. | Large | beast | unaligned |
| Giant Anomalocaris | 1 | 0 ft., swim 30 ft. | Medium | beast | unaligned |
| Giant Brittle Star | 3 | 10 ft., swim 10 ft. | Large | beast | unaligned |
| Giant Eel | 2 | 0 ft., swim 40 ft. | Huge | beast | unaligned |
| Giant Hagfish | 1/4 | 0 ft., swim 30 ft. | Medium | beast | unaligned |
| Giant Octopus, Variant | 2 | 15 ft., climb 15 ft., swim 60 ft. | Large | beast | unaligned |
| Giant Pufferfish | 2 | 5 ft., swim 30 ft. | Medium | beast | unaligned |
| Giant Remora | 1 | 5 ft., swim 60 ft. | Medium | beast | unaligned |
| Giant Shallow Wave Stalker | 3 | 25 ft., swim 50 ft. | Large | beast | unaligned |
| Giant Slug | 1/4 | 20 ft. | Medium | beast | unaligned |
| Giant Starfish | 5 | 5 ft. | Large | beast | unaligned |
| Giant Zombie | 7 | 25 ft. | Huge | undead | neutral evil |
| Golden Octorok | 6 | 40 ft., burrow 5 ft., swim 40 ft. | Medium | beast | unaligned |
| Grand Sea Drake | 11 | 20 ft., fly 60 ft., swim 60 ft. | Huge | dragon | unaligned |
| Great Water Elemental | 8 | 30 ft., swim 90 ft. | Large | elemental | neutral |
| Gulper | 3 | 20 ft., swim 40 ft. | Small | fiend | lawful neutral |
| Gyorg | 9 | 0 ft., swim 40 ft. | Large | monstrosity | neutral evil |
| Hagonizer | 5 | 20 ft., swim 40 ft. | Medium | monstrosity | unaligned |
| Hippocampus | 2 | 20 ft., swim 90 ft. | Large | monstrosity | chaotic good |
| Horned Hulk | 7 | 40 ft., burrow 10 ft. | Large | monstrosity | chaotic evil |
| Ichthyosaurus | 2 | 0 ft., swim 50 ft. | Medium | beast | unaligned |
| Ignifish | 1/4 | 0 ft., swim 30 ft. | Tiny | beast | unaligned |
| Ingkludd | 0 | 0 ft. | Small | monstrosity | unaligned |
| Jolly Roger | 2 | 25 ft., swim 30 ft. | Medium | undead | chaotic evil |
| Juvenile Reaper Leviathan | 7 | 0 ft., swim 40 ft. | Large | monstrosity | unaligned |
| Kelp Angler | 9 | 20 ft., swim 60 ft. | Large | plant | unaligned |
| Kelpie | 2 | 60 ft., swim 60 ft. (25 ft., swim 30 ft. in humanoid form) | Medium | plant | chaotic evil |
| Kikimora | 2 | 30 ft., burrow 10 ft., climb 30 ft., swim 30 ft. | Medium | undead | neutral evil |
| Krakentua | 24 | 40 ft., swim 30 ft. | Gargantuan | aberration | neutral evil |
| Kronosaurus | 7 | 0 ft., swim 60 ft. | Huge | beast | unaligned |
| Kurajaku | 13 | 25 ft. (40 ft. while underwater), swim 15 ft. | Huge | beast | unaligned |
| Lagiacrus | 22 | 40 ft., swim 90 ft. | Gargantuan | beast | neutral |
| Lava Snail | 3 | 15 ft., swim 30 ft. | Large | beast | neutral |
| Like Like | 5 | 20 ft. | Large | ooze | unaligned |
| Liopluerodon | 10 | 0 ft., swim 90 ft. | Huge | beast | unaligned |
| Lorn-Fluke | 13 | 10 ft., swim 50 ft. | Gargantuan | aberration | chaotic evil |
| Lornest-Fluke | 11 | 10 ft., swim 50 ft. | Gargantuan | aberration | chaotic evil |
| Mackralich | 1/2 | 0 ft., swim 40 ft. | Medium | undead | unaligned |
| Magma Dweller | 18 | 40 ft., burrow 20 ft., swim 40 ft. | Huge | elemental | chaotic neutral |
| Manatee | 1/2 | 0 ft., swim 30 ft. | Large | beast | unaligned |
| Marple | 0 | 5 ft., fly 15 ft., swim 15 ft. | Tiny | fey | neutral |
| Marshtomp | 4 | 35 ft. | Medium | beast | lawful good |
| Medusozoan | 2 | 0 ft., swim 25 ft. | Large | monstrosity | unaligned |
| Megalodon | 10 | 5 ft., swim 50 ft. | Gargantuan | beast | unaligned |
| Merfolk Hoplite | 7 | 10 ft., swim 40 ft. | Medium | humanoid | neutral |
| Merfolk Hunter | 1 | 10 ft., swim 40 ft. | Medium | humanoid | neutral |
| Merfolk Knight | 1 | 30 ft., swim 40 ft. | Medium | humanoid | lawful good |
| Merfolk Pikeman | 1 | 10 ft., swim 40 ft. | Medium | humanoid | neutral |
| Merfolk Seasage | 1 | 10 ft. (20 ft. with longstrider), swim 40 ft. | Medium | humanoid | neutral |
| Merfolk Stormbrewer | 6 | 10 ft., fly 20 ft., swim 40 ft. | Medium | humanoid | neutral |
| Merwyrm | 7 | 30 ft., swim 60 ft. | Large | dragon | chaotic evil |
| Metalhead Zombie | 1 | 20 ft. | Medium | undead | chaotic evil |
| Milaq | 5 | 15 ft., swim 45 ft. | Large | monstrosity | chaotic evil |
| Mosasaur | 14 | 0 ft., swim 60 ft. | Gargantuan | beast | unaligned |
| Motomazor | 17 | 0 ft., swim 80 ft. | Gargantuan | beast | unaligned |
| Mudkip | 1 | 30 ft. | Small | beast | lawful good |
| Murk Elemental | 5 | 30 ft., swim 40 ft. | Large | elemental | chaotic neutral |
| Murloc | 1/4 | 25 ft., swim 30 ft. | Small | humanoid | chaotic neutral |
| Murloc Murk-Mage | 1/2 | 25 ft., swim 30 ft. | Small | humanoid | chaotic neutral |
| Necrofex Colossus | 17 | 30 ft., swim 30 ft. | Gargantuan | construct | neutral evil |
| Nekronaut | 2 | 30 ft. | Small | undead | lawful neutral |
| Neptune's Harlot | 6 | 30 ft., swim 30 ft. | Large | beast | unaligned |
| Nymphernal | 4 | 30 ft., swim 30 ft. | Medium | monstrosity | unaligned |
| Ocean Dragon Lord - Neo - Daedalus | 8 | 30 ft., swim 80 ft. | Huge | dragon | chaotic neutral |
| Ochaun | 5 | 20 ft., swim 40 ft. | Large | giant | neutral |
| Octofolk | 1/2 | 20 ft., swim 30 ft. | Medium | humanoid | lawful neutral |
| Octofolk Entangler | 3 | 20 ft., swim 30 ft. | Medium | humanoid | lawful neutral |
| Octohulk | 4 | 20 ft., swim 30 ft. | Large | monstrosity | lawful evil |
| Octorok | 1/4 | 30 ft., swim 30 ft. | Medium | beast | unaligned |
| Ophititan | 1/2 | 35 ft., swim 30 ft. | Medium | beast | unaligned |
| Ophthalmosaurus | 2 | 5 ft., swim 45 ft. | Medium | beast | unaligned |
| Pearl Giant | 9 | 40 ft., swim 40 ft. | Huge | giant | any lawful alignment |
| Pearl Titan | 18 | 40 ft., swim 40 ft. | Gargantuan | giant | any lawful alignment |
| Pink Dragon Wyrmling | 2 | 30 ft., fly 60 ft., swim 30 ft. | Medium | dragon | lawful evil |
| Pliosaurus | 10 | 0 ft., swim 90 ft. | Gargantuan | beast | unaligned |
| Poolhusk | 2 | 30 ft., swim 35 ft. | Medium | undead | neutral evil |
| Poolhusk Frostborn | 8 | 30 ft., swim 50 ft. | Medium | undead | neutral evil |
| Porcupine Zombie | 2 | 20 ft. | Medium | undead | chaotic evil |
| Porpoise | 1/4 | 5 ft., swim 50 ft. | Medium | beast | unaligned |
| Psychic Zombie | 6 | 20 ft. | Medium | undead | chaotic evil |
| Quill Scarab | 1/4 | 20 ft., climb 20 ft., swim 20 ft. | Small | beast | unaligned |
| Renzhuyo | 5 | 15 ft., swim 25 ft. | Large | beast | unaligned |
| River Zora | 1/4 | 30 ft., swim 50 ft. | Medium | humanoid | any alignment |
| Rubbery Man | 1 | 30 ft. | Medium | aberration | any neutral alignment |
| Runner Zombie | 1 | 40 ft. | Medium | undead | chaotic evil |
| Scorn-Fluke | 17 | 10 ft., swim 50 ft. | Gargantuan | aberration | chaotic evil |
| Screamer Zombie | 2 | 20 ft. | Medium | undead | chaotic evil |
| Sea Dog | 1/4 | 20 ft., swim 40 ft. | Medium | beast | unaligned |
| Sea Drake | 8 | 20 ft., fly 60 ft., swim 60 ft. | Large | dragon | unaligned |
| Sea Orc | 1/2 | 30 ft., swim 30 ft. | Medium | humanoid | chaotic evil |
| Sea Slime | 2 | 10 ft., climb 10 ft., swim 20 ft. | Medium | ooze | unaligned |
| Sea Turtle | 1/8 | 5 ft., swim 40 ft. | Medium | beast | unaligned |
| Sea Urchin | 0 | 5 ft., swim 10 ft. | Tiny | beast | unaligned |
| Seahat | 3 | 5 ft., fly 40 ft. (hover), swim 10 ft. | Huge | plant | unaligned |
| Seawolf, Greater | 2 | 20 ft., swim 50 ft. (30 ft., swim 30 ft. in hybrid form, 30 ft. in humanoid form) | Large | monstrosity | chaotic evil |
| Seawolf, Lesser | 1/2 | 20 ft., swim 40 ft. (30 ft., swim 20 ft. in hybrid form, 30 ft. in humanoid form) | Medium | monstrosity | chaotic evil |
| Selkie | 1/2 | 30 ft. (20 ft., swim 30 ft. in seal or hybrid form) | Medium | humanoid | neutral |
| Shadow Elemental | 5 | 0 ft., fly 60 ft. (hover) | Large | elemental | chaotic neutral |
| Shalarin Arcane | 4 | 30 ft., swim 30 ft. | Medium | humanoid | lawful neutral |
| Shalarin Judge | 6 | 30 ft., swim 30 ft. | Medium | humanoid | lawful evil |
| Shalarin Protector | 3 | 30 ft., swim 30 ft. | Medium | humanoid | lawful neutral |
| Shalarin Provider | 1/2 | 30 ft., swim 30 ft. | Medium | humanoid | lawful neutral |
| Shalarin Scholar | 1 | 30 ft., swim 30 ft. | Medium | humanoid | lawful neutral |
| Shalarin Seeker | 2 | 30 ft., swim 30 ft. | Medium | humanoid | lawful neutral |
| Shallow Wave Stalker | 1/8 | 10 ft., swim 35 ft. | Medium | beast | unaligned |
| Shapeless | 1/4 | 30 ft., swim 30 ft. (30 ft., swim 60 ft. in shapeless form) | Medium | elemental | neutral |
| Shapeless Assassin | 1/2 | 30 ft., swim 30 ft. (30 ft., swim 60 ft. in shapeless form) | Medium | elemental | neutral |
| Shapeless Fighter | 1/2 | 30 ft., swim 30 ft. (30 ft., swim 60 ft. in shapeless form) | Medium | elemental | neutral |
| Shapeless Giant | 5 | 30 ft., swim 30 ft. (40 ft., swim 80 ft. in shapeless form) | Large | elemental | neutral |
| Shapeless Mage | 1/2 | 30 ft., swim 30 ft. (30 ft., swim 60 ft. in shapeless form) | Medium | elemental | neutral |
| Shapeless Ranger | 1/2 | 30 ft., swim 30 ft. (30 ft., swim 60 ft. in shapeless form) | Medium | elemental | neutral |
| Shimmerfish | 1/2 | 0 ft., swim 60 ft. | Medium | monstrosity | chaotic evil |
| Shockscale Perch | 1/4 | 0 ft., swim 30 ft. | Tiny | beast | unaligned |
| Shoggoth | 13 | 30 ft., swim 30 ft. | Huge | aberration | chaotic neutral |
| Siege Crab | 14 | 60 ft., swim 60 ft. | Gargantuan | monstrosity | unaligned |
| Skullfish | 4 | 0 ft., swim 40 ft. | Small | undead | chaotic evil |
| Somnambulist | 5 | 30 ft., swim 40 ft. | Medium | undead | neutral evil |
| Sonic Springtail | 1/2 | 0 ft., swim 35 ft. | Small | beast | unaligned |
| Spitter Zombie | 2 | 20 ft. | Medium | undead | chaotic evil |
| Star Spawn of Cthulhu | 18 | 40 ft., fly 60 ft., swim 60 ft. | Huge | aberration | chaotic evil |
| Stonefin | 6 | 0 ft., burrow 40 ft., swim 40 ft. | Large | elemental | neutral |
| Storm Giant Skeleton | 11 | 50 ft., swim 50 ft. | Huge | undead | lawful evil |
| Storm Giant Soothsayer | 18 | 50 ft., swim 50 ft. | Huge | giant | chaotic good (75%) or neutral evil (25%) |
| Storm Titan | 21 | 50 ft., swim 50 ft. | Gargantuan | giant | chaotic good |
| Swarm of Bioluminescent Plankton | 0 | 0 ft., swim 5 ft. | Medium | beast | unaligned |
| Swarm of Shadowcrabs | 1/4 | 20 ft., climb 20 ft., swim 20 ft. | Medium | undead | unaligned |
| Tagduru | 3 | 35 ft., climb 20 ft., swim 40 ft. | Large | beast | unaligned |
| Tako | 1 | 30 ft., swim 20 ft. | Medium | monstrosity | lawful neutral |
| Thalassocnus | 1 | 20 ft., swim 30 ft. | Medium | beast | unaligned |
| Thermovile Queen | 15 | 40 ft., climb 30 ft. | Huge | monstrosity | unaligned |
| Tide Ruler | 18 | 60 ft., swim 60 ft. | Gargantuan | elemental | neutral |
| Tideborn | 1 | 30 ft., swim 30 ft. | Medium | humanoid | neutral evil |
| Tideborn Exalted | 14 | 30 ft., swim 60 ft. | Medium | elemental | neutral evil |
| Tideborn Maelstrom | 5 | 30 ft., swim 30 ft. | Medium | humanoid | neutral evil |
| Turtlefolk | 1 | 20 ft., swim 40 ft. | Medium | humanoid | neutral |
| Tylosaurus | 14 | 0 ft., swim 60 ft. | Huge | beast | unaligned |
| Undead Whale | 10 | 5 ft., swim 50 ft. | Gargantuan | undead | neutral evil |
| Undertow Stalker | 7 | 5 ft., swim 40 ft. | Large | monstrosity | neutral |
| Uurugetar | 1 | 40 ft, climb 30 ft., swim 20 ft. | Large | beast | unaligned |
| Verucka | 4 | 5 ft., swim 60 ft. | Huge | monstrosity | chaotic evil |
| Void-Corrupted Astral Tideborn | 10 | 40 ft., swim 60 ft. | Large | aberration | chaotic evil |
| Wardolphin | 2 | 0 ft., swim 40 ft. | Medium | beast | neutral |
| Wasgo | 14 | 40 ft., swim 60 ft. | Gargantuan | monstrosity | unaligned |
| Water Giant | 7 | 40 ft., swim 40 ft. | Huge | giant | neutral evil |
| Wereoctopus | 2 | 30 ft. (15 ft., swim 60 ft. in octopus or hybrid form) | Medium | humanoid | neutral evil |
| Wereshark | 4 | 30 ft., swim 30 ft. (0 ft., swim 60 ft. in shark form) | Medium | humanoid | neutral evil |
| Whale Pishacha | 13 | 20 ft., swim 200 ft. | Gargantuan | fiend | unaligned |
| Whale Zombie | 4 | 0 ft., swim 50 ft. | Huge | undead | neutral evil |
| Young Pink Dragon | 8 | 40 ft., fly 80 ft., swim 40 ft. | Large | dragon | lawful evil |
| Zipping Turtle | 1 | 70 ft., climb 70 ft., swim 70 ft. | Small | monstrosity | unaligned |
| Zombie Leader | 3 | 30 ft. | Medium | undead | chaotic evil |
| Zombie, Variant | 1 | 20 ft. | Medium | undead | chaotic evil |
Incomplete Underwater Monsters[edit]
These creatures are tagged with an Improving, Reviewing, or Deletion template. Please help work on the problem presented on the template.
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