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Type: magical beast
CR
Source
Terrain
Climate
Movement: Swim
44 creatures
| Name ▲ | CR | Alignment | Size | Description |
|---|---|---|---|---|
| Abaia | 10 | N | Huge | This multi-eyed eel’s brightly colored markings shift in complex, ever-changing patterns. |
| Ahuizotl | 6 | NE | Large | This bear-sized beast has a body like a squat simian, a dog’s face, and a long tail that ends in... |
| Akhlut | 13 | N | Huge | A dorsal fin rises up from the back of this immense black-and- white-furred, wolflike beast. |
| Amphisbaena | 4 | N | Large | This large snake has two heads, one at each end of its long, coiling body. Both display large... |
| Blindheim | 2 | N | Small | The size of a short, stocky humanoid with webbed feet and claws, this frog-like creature has... |
| Bokrug | 27 | CN | Large | |
| Bunyip | 3 | N | Medium | A disturbing combination of shark and seal, this brown-furred creature has a wide mouth filled... |
| Catoblepas | 12 | N | Large | This ugly creature has a boar-like head with short antlers, a thick bullish body covered in... |
| Cherufe | 13 | NE | Huge | This towering reptilian humanoid seems to be made of obsidian scales over a molten magma core. |
| Deep Sea Serpent | 19 | N | Gargantuan | |
| Devilfish | 4 | NE | Large | This purple, seven-armed octopoid monstrosity is the size of a horse, with hook-lined tentacles... |
| Divine Guardian Hydra | 5 | N | Huge | |
| Echeneis | 1 | N | Small | This thin, colorful fish has a broad, segmented sucker above its narrow mouth. A line of spines... |
| Galvo | 9 | NE | Medium | This creature is composed of dozens of electric eels tightly knotted into a slithering, humanoid... |
| Giant Muckdweller | 2 | N | Large | |
| Grodair | 5 | CN | Medium | Several water-dripping tentacles sprout from this four-eyed fish’s belly, while long fins... |
| Grootslang | 16 | CE | Gargantuan | This enormous beast has the combined features of an elephant and a serpent. Its tremendous maw... |
| Hippocampus | 1 | N | Large | This creature has the foreparts of a horse and the hindquarters of a fish. Its forelegs end in... |
| Hydra | 4 | N | Huge | |
| Isonade | 15 | CE | Gargantuan | This massive horror looks like a shark protected by a crab carapace, with a tail, flanks, and... |
| Julunggali | 21 | N | Colossal | Resplendent lilac and white scales adorn this gigantic serpent. A number of sharp, short horns... |
| Ketesthius | 13 | LE | Gargantuan | This enormous wolf-headed sea serpent’s maw leads into what seems to be an endless expanse within. |
| Kraken | 18 | NE | Gargantuan | |
| Lukwata | 11 | N | Huge | A long, spiny fin runs down the length of the dolphinlike body of this eel-headed predator. |
| Lusca | 17 | CE | Gargantuan | This beast has three sharklike heads on short, scaly necks, while its lower body appears to be... |
| Makara Vahana | 9 | N | Huge | |
| Mobogo | 10 | CE | Huge | This grotesque creature looks like a gigantic toad with leathery wings, fangs, horns, and three... |
| Mogaru | 28 | CN | Colossal | |
| Muckdweller | 1/4 | N | Small | This bipedal lizard has mottled gray-and-brown flesh. A short dorsal fin runs the length of its... |
| Ophiotaurus | 17 | N | Gargantuan | This enormous russet serpent has the head and forequarters of a ruddy bull with bronze horns and hooves. |
| Purple Worm | 12 | N | Gargantuan | |
| Rat King | 5 | N | Small | Squeaks and chittering cries rise from a tangle of diseased rats with their tails knotted together. |
| Ratling | 2 | CE | Tiny | This ratlike creature has tiny human hands in place of its front paws, and an unnerving human... |
| Rat Plague Swarm | 11 | LE | Tiny | |
| Sea Cat | 4 | N | Large | This fierce creature merges the front half of a great cat with the tail and other... |
| Sea Serpent | 12 | N | Gargantuan | |
| Seaweed Siren | 13 | CN | Large | This creature’s three singing heads sway atop serpentine necks that extend from a bulbous body... |
| Shocker Lizard | 2 | N | Small | |
| Thalassic Behemoth | 20 | N | Colossal | |
| Tizheruk | 5 | N | Large | This serpentine beast undulates through the water. Its scaly skin and its flesh are clear,... |
| Uraeus | 5 | LG | Medium | This two-headed cobra flies with a large pair of sleek, black- feathered wings that sprout from... |
| Voonith | 4 | CN | Small | This brightly colored, long-necked amphibian has six legs, a fanged snout, and numerous finlets... |
| Water Leaper | 2 | CN | Small | This vicious monster has webbed wings, a mouth full of sharp teeth, and a long tail ending a... |
| Water Orm | 10 | N | Huge | A reptilian head on a serpentine neck slowly surfaces. Shadows beneath the water hint at a body... |