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 |
---|---|---|---|---|---|
Ammonite | 0 | 0 ft., swim 20 ft. | Tiny | 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 |
Bellowshell | 2 | 20 ft., swim 20 ft. | Large | monstrosity | 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 |
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 |
Colossal Octopus | 15 | 20 ft., swim 60 ft. | Gargantuan | beast | unaligned |
Deep One | 1 | 30 ft., swim 40 ft. | Medium | monstrosity | neutral evil |
Deep Tentacle | 1/8 | 5 ft., swim 40 ft. | Medium | undead | 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 |
Dunkleosteus | 4 | 0 ft., swim 20 ft. | Huge | 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 |
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 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 |
Giant Ammonite | 2 | 0 ft., swim 20 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 Slug | 1/2 | 20 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 |
Gyorg | 9 | 0 ft., swim 40 ft. | Large | monstrosity | neutral evil |
Hippocampus | 2 | 20 ft., swim 90 ft. | Large | monstrosity | chaotic good |
Ichthyosaurus | 2 | 5 ft., swim 50 ft. | Medium | beast | 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 |
Kikimora | 2 | 30 ft., burrow 10 ft., climb 30 ft., swim 30 ft. | Medium | undead | 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 |
Lord of the Coast (Grand Line Supplement) | 4 | 80 Swimming Speed | Large | beast | chaotic neutral |
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 |
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 |
Motomazor | 17 | 0 ft., swim 80 ft. | Gargantuan | beast | unaligned |
Mudkip | 1 | 30 ft. | Small | beast | lawful good |
Necrofex Colossus | 17 | 30 ft., swim 30 ft. | Gargantuan | construct | neutral evil |
Nymphernal | 4 | 30 ft., swim 30 ft. | Medium | monstrosity | unaligned |
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 |
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 |
Porcupine Zombie | 2 | 20 ft. | Medium | undead | chaotic evil |
Psychic Zombie | 6 | 20 ft. | Medium | undead | chaotic evil |
Runner Zombie | 1 | 40 ft. | Medium | undead | 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 Monkey | 1/8 | 20 ft., swim 40 ft. | Small | beast | 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 |
Shadow Elemental | 5 | 0 ft., fly 60 ft. (hover) | Large | elemental | chaotic neutral |
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 |
Shoggoth | 13 | 30 ft., swim 30 ft. | Huge | aberration | chaotic neutral |
Skullfish | 4 | 0 ft., swim 40 ft. | Small | undead | chaotic evil |
Spitter Zombie | 2 | 20 ft. | Medium | undead | 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 |
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 |
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 |
Undead Whale | 10 | 5 ft., swim 50 ft. | Gargantuan | undead | neutral evil |
Undertow Stalker | 7 | 5 ft., swim 40 ft. | Large | monstrosity | neutral |
Verucka | 4 | 5 ft., swim 60 ft. | Huge | monstrosity | chaotic evil |
Wardolphin | 2 | 0 ft., swim 40 ft. | Medium | beast | neutral |
Wereshark | 4 | 30 ft., swim 30 ft. (0 ft., swim 60 ft. in shark form) | Medium | humanoid | neutral evil |
Whale Zombie | 4 | 0 ft., swim 50 ft. | Huge | undead | neutral 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 |
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