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Climate: Warm
Movement: Swim
56 creatures
| Name ▲ | CR | Type | Alignment | Size | Description |
|---|---|---|---|---|---|
| Abaia | 10 | magical beast | N | Huge | This multi-eyed eel’s brightly colored markings shift in complex, ever-changing patterns. |
| Adaro | 3 | monstrous humanoid | NE | Medium | This hybrid of human and shark holds its spear menacingly, thick, glistening saliva dripping... |
| Ahuizotl | 6 | magical beast | NE | Large | This bear-sized beast has a body like a squat simian, a dog’s face, and a long tail that ends in... |
| Ancient Black Dragon | 16 | dragon | CE | Huge | |
| Ancient Green Dragon | 17 | dragon | LE | Gargantuan | |
| Ancient Sea Dragon | 17 | dragon | CG | Gargantuan | |
| Ancient White Dragon | 15 | dragon | CE | Huge | |
| Archelon | 5 | animal | N | Huge | |
| Cecaelia | 5 | monstrous humanoid | CN | Medium | In place of legs, this handsome humanoid sports an octopus’s eight writhing tentacles. |
| Compsognathus | 1/2 | animal | N | Tiny | |
| Constrictor Snake | 2 | animal | N | Medium | |
| Crocodile | 2 | animal | N | Large | |
| Dire Crocodile | 9 | animal | N | Gargantuan | |
| Echeneis | 1 | magical beast | N | Small | This thin, colorful fish has a broad, segmented sucker above its narrow mouth. A line of spines... |
| Elasmosaurus | 7 | animal | N | Huge | |
| Electric Eel | 2 | animal | N | Small | |
| Emperor Cobra | 5 | animal | N | Large | |
| Encantado | 8 | fey | CN | Medium | This graceful creature combines the features of a human and a river dolphin. |
| Faerie Dragon | 2 | dragon | CG | Tiny | A pair of brightly colored butterfly wings sprouts from the back of this miniature dragon. A... |
| Frog Father | 5 | animal | N | Huge | This elephantine amphibian has a grotesquely long tongue and beady eyes. |
| Giant Anaconda | 10 | animal | N | Gargantuan | |
| Giant Dragonfly Nymph | 3 | vermin | N | Small | |
| Giant Frog | 1 | animal | N | Medium | |
| Giant Leech | 2 | vermin | N | Medium | |
| Giant Mantis Shrimp | 9 | vermin | N | Medium | |
| Giant Snapping Turtle | 9 | animal | N | Gargantuan | |
| Grootslang | 16 | magical beast | CE | Gargantuan | This enormous beast has the combined features of an elephant and a serpent. Its tremendous maw... |
| Leech Swarm | 4 | vermin | N | Diminutive | |
| Locathah | 1/2 | humanoid | N | Medium | This lean humanoid bears crested fins on its head and back, and has the wide-eyed and... |
| Lukwata | 11 | magical beast | N | Huge | A long, spiny fin runs down the length of the dolphinlike body of this eel-headed predator. |
| Lusca | 17 | magical beast | CE | Gargantuan | This beast has three sharklike heads on short, scaly necks, while its lower body appears to be... |
| Manta Ray | 1 | animal | N | Large | |
| Megalania | 7 | animal | N | Huge | |
| Mogaru | 28 | magical beast | CN | Colossal | |
| Monitor Lizard | 2 | animal | N | Medium | |
| Mudlord | 6 | outsider | N | Medium | This fluid creature’s roughly humanoid form is composed entirely of thick gobbets of soggy, brown mud. |
| Ningyo | 1 | monstrous humanoid | NE | Small | This dog-sized creature combines the upper half of a deformed monkey with the lower half of a... |
| Ophiotaurus | 17 | magical beast | N | Gargantuan | This enormous russet serpent has the head and forequarters of a ruddy bull with bronze horns and hooves. |
| Platypus | 1/6 | animal | N | Tiny | |
| Plesiosaurus | 2 | animal | N | Large | |
| Poison Frog | 1/2 | animal | N | Tiny | |
| Sahuagin | 2 | monstrous humanoid | LE | Medium | |
| Sapphire Jellyfish | 11 | vermin | N | Huge | |
| Sea Cat | 4 | magical beast | N | Large | This fierce creature merges the front half of a great cat with the tail and other... |
| Shocker Lizard | 2 | magical beast | N | Small | |
| Snapping Turtle | 1/3 | animal | N | Tiny | |
| Spinosaurus | 11 | animal | N | Gargantuan | |
| Stingray | 1/2 | animal | N | Medium | |
| Storm Giant | 13 | humanoid | CG | Huge | |
| Stranglereed | 9 | plant | N | Large | This tangled mass of thick reeds extends from a bulbous pod split by a wide, thorn-toothed maw. |
| Tunche | 17 | fey | CN | Huge | Standing on three legs, this creature is a mix of dangerous jungle animals and plants fused into... |
| Uraeus | 5 | magical beast | LG | Medium | This two-headed cobra flies with a large pair of sleek, black- feathered wings that sprout from... |
| Venomous Snake | 1 | animal | N | Medium | |
| Viper | 1/2 | animal | N | Tiny | |
| Werebat (Human Form) | 3 | humanoid | NE | Medium | |
| Werecrocodile (Human Form) | 3 | humanoid | NE | Medium |