# Monsters by Habitat; Underwater Monsters *Source: Monster Manual (2024) p. 375* **Underwater Monsters** | CR | Monsters | |----|----------| | 0 | [Crab](/Rules/Source/bestiary/beast/crab-xmm.md), [Octopus](/Rules/Source/bestiary/beast/octopus-xmm.md), [Piranha](/Rules/Source/bestiary/beast/piranha-xmm.md), [Seahorse](/Rules/Source/bestiary/beast/seahorse-xmm.md) | | 1/8 | [Giant Crab](/Rules/Source/bestiary/beast/giant-crab-xmm.md), [Merfolk Skirmisher](/Rules/Source/bestiary/elemental/merfolk-skirmisher-xmm.md) | | 1/4 | [Constrictor Snake](/Rules/Source/bestiary/beast/constrictor-snake-xmm.md) | | 1/2 | [Giant Seahorse](/Rules/Source/bestiary/beast/giant-seahorse-xmm.md), [Reef Shark](/Rules/Source/bestiary/beast/reef-shark-xmm.md), [Sahuagin Warrior](/Rules/Source/bestiary/fiend/sahuagin-warrior-xmm.md) | | 1 | [Giant Octopus](/Rules/Source/bestiary/beast/giant-octopus-xmm.md), [Swarm of Piranhas](/Rules/Source/bestiary/beast/swarm-of-piranhas-xmm.md) | | 2 | [Giant Constrictor Snake](/Rules/Source/bestiary/beast/giant-constrictor-snake-xmm.md), [Hunter Shark](/Rules/Source/bestiary/beast/hunter-shark-xmm.md), [Merrow](/Rules/Source/bestiary/monstrosity/merrow-xmm.md), [Plesiosaurus](/Rules/Source/bestiary/beast/plesiosaurus-xmm.md), [Sahuagin Priest](/Rules/Source/bestiary/fiend/sahuagin-priest-xmm.md), [Sea Hag](/Rules/Source/bestiary/fey/sea-hag-xmm.md) | | 3 | [Killer Whale](/Rules/Source/bestiary/beast/killer-whale-xmm.md) | | 4 | [Archelon](/Rules/Source/bestiary/beast/archelon-xmm.md) | | 5 | [Giant Shark](/Rules/Source/bestiary/beast/giant-shark-xmm.md), [Sahuagin Baron](/Rules/Source/bestiary/fiend/sahuagin-baron-xmm.md), [Water Elemental](/Rules/Source/bestiary/elemental/water-elemental-xmm.md) | | 6 | [Giant Squid](/Rules/Source/bestiary/beast/giant-squid-xmm.md), [Merfolk Wavebender](/Rules/Source/bestiary/elemental/merfolk-wavebender-xmm.md) | | 10 | [Aboleth](/Rules/Source/bestiary/aberration/aboleth-xmm.md) | | 11 | [Marid](/Rules/Source/bestiary/elemental/marid-xmm.md) | | 13 | [Storm Giant](/Rules/Source/bestiary/giant/storm-giant-xmm.md) | | 17 | [Dragon Turtle](/Rules/Source/bestiary/dragon/dragon-turtle-xmm.md) | | 23 | [Kraken](/Rules/Source/bestiary/monstrosity/kraken-xmm.md) | ^underwater-monsters