Wait, didn’t we just do this?
Lore: Aquatic Servants of the Demon Prince
Merrow are savage hunters that will eat just about anything edible, from fishermen to merfolk. Long ago, they were themselves merfolk, but that all changed when one tribe found an idol of a Demogorgon. All in the tribe touched it and went mad, then performed a ritual to open a gateway towards the Demogorgon’s domain. They remained there for generations, eventually becoming the savage merrow.
The Prince of Demons often sends them to the Material Plane to essentially bully those on the ocean. Anyone or anything smaller and weaker than them is a target. They’ll fill their undersea caverns with trophies taken from these victims, then tie the rotting corpses of their dead foes to mark their territory.
This is some pretty versatile lore! Maybe the party comes across a merrow domain in an underwater adventure and have to rescue some fishermen or a cute aquatic creature. Perhaps they’ve pissed off the Demogorgon and he sends the merrow to assault them on the sea. You could put them together with the merfolk to create a war between pure and corrupted fish people. It isn’t whole campaign worthy, but it can serve as a nice spice to one or as a cool side quest.
Design: A Familiar Song and Dance

Before reading the lore, I really wasn’t much a fan of this design. “Oh, look. Another fish person. If only we hadn’t just done that!”
At its core, that’s what it is. But the lore does make it a bit more interesting. The fact that it looks like the merfolk, just darker, angrier, and more evil is the whole point. And in that regard, the artists absolutely nailed this design.
Is it creative or interesting? No, not on its own. But it does a great job of communicating the lore behind the design. So at least it has that going for it.
Stats: Merfolk, but… More
Well, this is disappointing.
This is as basic a low-level enemy as you can get. Neither its HP nor AC are all that high, it has no special abilities, and all of its melee attacks are really simple. The most interesting thing these guys have is that they can pull enemies closer to them with the harpoon.
That’s it. It’s another slugfest monster. Boring.
Placement
Overall, this is a fairly weak monster. Its lore is decent and its design, while unoriginal, does fit it well. If it had an interesting fight attached to it all, it would have climbed a bit higher. As it stands, though, it won’t go all that high at all.
With all that in mind, let’s put the Merrow on the Best of the Bestiary!
- Beholder
- Death Tyrant
- Dragon Turtle
- Green Dragons
- Red Dragons
- Blue Dragons
- Black Dragons
- White Dragons
- Silver Dragons
- Couatl
- Behir
- Aboleth
- Sea Hag
- Lamia
- Bronze Dragons
- Brass Dragons
- Copper Dragons
- Gold Dragons
- Chuul
- Kuo-Toa
- Gibbering Mouther
- Kraken
- Intellect Devourer
- Chimera
- Death Knight
- Fomorian
- Bone Devil
- Dracolich
- Faerie Dragon
- Lich
- Magmin
- Kobold
- Kenku
- Hobgoblins
- Night Hag
- Green Hag
- Ankheg
- Hook Horror
- Storm Giant
- Hill Giant
- Empyrean
- Efreeti
- Grimlock
- Dao
- Cloud Giant
- Manticore
- Drow (all four of ’em)
- Shadow Demon
- Marilith
- Drider
- Aarackockra
- Azer
- Demilich
- Spectator
- Hydra
- Marid
- Harpy
- Werejackal
- Half-Dragon
- Cambion
- Fire Giant
- Animated Armor
- Banshee
- Basilisk
- Yochlol
- Bulette
- Cloaker
- Darkmantle
- Doppelganger
- Ghoul and Ghast
- Ettin
- Medusa
- Pit Fiend
- Erinyes
- Chain Devil
- Bearded Devil
- Barbed Devil
- Spined Devil
- Ice Devil
- Djinni
- Merrow <——————–
- Nalfeshnee
- Glabrezu
- Chasme
- Grell
- Barlgura
- Horned Devil
- Balor
- Shadow Dragon
- Werebear
- Lizardfolk
- Vrock
- Dretch
- Gnolls (all three)
- Goristro
- Hezrou
- Manes
- Frost Giant
- Weretiger
- Werewolf
- Duergar
- Quasit
- Dryad
- Flumph
- Goblin
- Wereboar
- Wererat
- Githyanki
- Planetar
- Imp
- Clay Golem
- Flameskull
- Displacer Beast
- Carrion Crawler
- Githzerai
- Grick
- Invisible Stalker
- Rug of Smothering
- Bugbear Chief
- Bugbear
- Flesh Golem
- Vine Blight
- Twig Blight
- Needle Blight
- Mephits (all six of ’em)
- Bullywug
- Hellhound
- Ettercap
- Gas Spore
- Cockatrice
- Lemure
- Homonculus
- Merfolk
- Solar
- Deva
- Gorgon
- Hippogriff
- Griffon
- Cyclops
- Centaur
- Ghost
- Fire Elemental
- Water Elemental
- Air Elemental
- Stone Giant
- Deep Gnome
- Dinosaurs (All six of them)
- Iron Golem
- Stone Golem
- Earth Elemental
- Galeb Duhr
- Helmed Horror
- Flying Sword
- Crawling Claw
- Violet Fungus
- Shrieker
- Gargoyle
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