| Hyacinth Lamprey | -1 | Uncommon | 6 | 15 | AquaticElementalPlant |
| Pufferfish | -1 | Common | 12 | 12 | AnimalAquatic |
| Seaborn Fisher | -1 | Common | 9 | 15 | AquaticChaoticElfHumanoid |
| Trilobite | -1 | Common | 7 | 15 | AnimalAquatic |
| Whippoorwill Electric Eel | -1 | Common | 8 | 14 | AnimalAquatic |
| Blue-Ringed Octopus | - | Common | 15 | 16 | AnimalAquatic |
| Reefclaw Spawn | - | Common | 17 | 18 | AberrationAmphibiousAquatic |
| Riptide Octopus Swarm | - | Common | 14 | 16 | AnimalAquaticSwarm |
| Stingray | - | Common | 15 | 16 | AnimalAquatic |
| Stonefish | - | Common | 15 | 16 | AnimalAquatic |
| Vampire Squid | - | Common | 15 | 16 | AnimalAquatic |
| Baby Brine Shark | 1 | Uncommon | 20 | 16 | AquaticElementalWater |
| Bristled Reef Shark | 1 | Common | 21 | 16 | AnimalAquatic |
| Charmed Crab | 1 | Uncommon | 16 | 17 | AnimalAquatic |
| Dewdrop Jelly | 1 | Common | 20 | 16 | AquaticElementalWater |
| Electric Eel | 1 | Common | 18 | 16 | AnimalAquatic |
| Fuath | 1 | Common | 18 | 16 | AquaticFeyGremlin |
| Hippocampus | 1 | Common | 24 | 15 | AnimalAquatic |
| Lawn Crawfish | 1 | Common | 17 | 20 | AberrationAquaticChaotic |
| Manta Ray | 1 | Common | 24 | 16 | AnimalAquatic |
| Merfolk Warrior | 1 | Common | 19 | 18 | AquaticHumanoidMerfolk |
| Molted Reefclaw | 1 | Common | 17 | 17 | AberrationAquatic |
| Muraxi (3-4) | 1 | Unique | 20 | 16 | AquaticElementalWater |
| Nixie | 1 | Common | 22 | 16 | AquaticFey |
| Razortoothed Shark | 1 | Uncommon | 20 | 16 | AnimalAquatic |
| Reef Octopus | 1 | Common | 20 | 17 | AnimalAquatic |
| Reefclaw | 1 | Common | 17 | 20 | AberrationAquatic |
| Reefclaw (BB) | 1 | Common | 17 | 20 | AberrationAquatic |
| Reefclaw (PFS 1-12) | 1 | Common | 17 | 20 | AberrationAquaticChaotic |
| Water Mephit | 1 | Common | 20 | 16 | AquaticElementalWater |
| Coralclaw | 2 | Uncommon | 30 | 18 | AnimalAquatic |
| Giant Crab | 2 | Common | 25 | 18 | AnimalAquatic |
| Lady Shimmersnip | 2 | Common | 21 | 19 | AnimalAquatic |
| Merfolk Wavecaller | 2 | Common | 30 | 17 | AquaticHumanoidMerfolk |
| Olobigonde | 2 | Common | 38 | 17 | AnimalAquaticElementalWater |
| Seaborn Captain | 2 | Common | 30 | 17 | AquaticChaoticElfHumanoid |
| Stonefish Swarm | 2 | Common | 25 | 16 | AnimalAquaticSwarm |
| Whippoorwill Piranha Swarm | 2 | Common | 25 | 14 | AnimalAquaticSwarm |
| Bloodthirsty Razortoothed Shark | 3 | Uncommon | 45 | 19 | AnimalAquatic |
| Brine Shark | 3 | Common | 45 | 19 | AquaticElementalWater |
| Brine Shark (BB) | 3 | Common | 45 | 19 | AquaticElementalWater |
| Bunyip | 3 | Common | 45 | 19 | AnimalAquatic |
| Fangtooth School | 3 | Common | 40 | 18 | AnimalAquaticSwarm |
| Giant Dragonfly Nymph | 3 | Common | 45 | 19 | AnimalAquatic |
| Muraxi (5-6) | 3 | Unique | 43 | 19 | AquaticElementalWater |
| Narwhal | 3 | Common | 50 | 18 | AnimalAquatic |
| Piranha Swarm | 3 | Common | 40 | 16 | AnimalAquaticSwarm |
| Planar Nixie | 3 | Uncommon | 55 | 19 | AquaticChaoticFeyWater |
| Silaqui (3-4) | 3 | Unique | 40 | 19 | AquaticElementalEvilLawfulWater |
| Swordfish | 3 | Common | 50 | 18 | AnimalAquatic |