Underwater City Name Generator

Press New city name for a made-up underwater city, the ocean depth zone it lies in and its light.

Underwater City Name Generator: 20 cities

Urchindeep, a city in the midnight zone, lit by eels that spark when the bells ring.

Padlock: keep a part. Arrows: change only that part.

  • OpeningUrchin
  • Endingdeep
  • Lies inthe midnight zone
  • Lit byeels that spark when the bells ring
Saved
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Every city you make is kept here, newest first, up to the last 20. The list stays in this browser.

    City of the day

     

    1. Seafanshelf, a city in the sunlight zone, lit by starfish that burn a soft orange.
    2. Frothdeep, a city in the abyssal zone, lit by blue plankton that flash when stirred.
    3. Phosphorchasm, a city in the sunlight zone, lit by shells with a cold flame inside.
    4. Ripplechasm, a city in the abyssal zone, lit by a thousand glowing brittle stars.
    5. Mantavault, a city in the sunlight zone, lit by crystal lamps tuned to whale song.
    6. Urchinshoal, a city in the midnight zone, lit by silver fish that turn like mirrors.
    7. Nereidvent, a city in the sunlight zone, lit by lantern kelp grown along every road.
    8. Cowriegrotto, a city in the twilight zone, lit by eels that spark when the bells ring.
    9. Urchindrift, a city in the midnight zone, lit by moss that shines on every wall.
    10. Wrassecavern, a city in the hadal zone, lit by shells with a cold flame inside.
    11. Soundingterrace, a city in the twilight zone, lit by crystal lamps tuned to whale song.
    12. Tealdrift, a city in the sunlight zone, lit by comb jellies drifting like slow rainbows.
    13. Gloomrise, a city in the sunlight zone, lit by lantern kelp grown along every road.
    14. Phosphorrift, a city in the hadal zone, lit by lantern kelp grown along every road.
    15. Stingraydrift, a city in the midnight zone, lit by blue plankton that flash when stirred.
    16. Gloomvault, a city in the sunlight zone, lit by starfish that burn a soft orange.
    17. Bluewatervault, a city in the twilight zone, lit by blue plankton that flash when stirred.
    18. Ripplevault, a city in the hadal zone, lit by anglerfish lures hung at every corner.
    19. Nacreshoal, a city in the midnight zone, lit by glass floats filled with glowing sand.
    20. Gloomtrench, a city in the midnight zone, lit by crystal lamps tuned to whale song.

    Next step Name someone who lives thereName what circles the walls

    How it works

    This underwater city name generator joins a sea word to an ending such as reef, trench or grotto, then sets the city in one of five real ocean depth zones, from the sunlight zone to the hadal zone.

    Read the full guide

    Press, then lock the zone

    Press New city name. Tap the zone, press its padlock and press again: every city then lies at that depth. The list under the tool gives the depth range of each zone in meters and feet, and what each ending means.

    Why every city has its own light

    Sunlight is very faint in the twilight zone and gone in the midnight zone, so each city is lit by something that glows. Lock a light you like and press again for a new name, such as Nacrevault: Nacre joined to vault.

    Tips
    • The hadal zone lies in ocean trenches: lock the ending on trench or chasm to match.
    • Print 20 cities at once to fill a sea chart.

    Questions and answers

    What are the five zones of the ocean?

    From the top down: the sunlight zone (epipelagic), the twilight zone (mesopelagic), the midnight zone (bathypelagic), the abyssal zone (abyssopelagic) and the hadal zone (hadopelagic), which lies in the deepest trenches.

    How deep is the midnight zone?

    The midnight zone, or bathypelagic zone, runs from 1,000 to 4,000 meters (3,300 to 13,100 feet) below the surface. The only light there comes from animals that make their own, such as anglerfish.

    What is a good name for an underwater city?

    One that sounds like the sea floor: a sea word joined to a place under water, such as a reef, a grotto or a trench. Each press here makes one that way and adds a depth and a light.

    Are these names taken from a game or a film?

    No. Every joined name was checked, as one word and as two, against lists of real places, Wikipedia titles and the page titles of fantasy fan wikis, and the part behind a match was cut.

    More tools

    Browse Entertainment

    Opening: all 42 openings

    Shells and sea life 14

    • Angelfish
    • Cowrie
    • Cuttle
    • Manta
    • Murex
    • Nacre
    • Orca
    • Polyp
    Show all 42 openings (34 more)

    Shells and sea life, continued

    • Seafan
    • Sepia
    • Sponge
    • Stingray
    • Urchin
    • Wrasse

    Tide and water 13

    • Bluewater
    • Bubble
    • Current
    • Froth
    • Greenwater
    • Maelstrom
    • Neap
    • Ripple
    • Riptide
    • Sounding
    • Surge
    • Tide
    • Vortex

    Light and dark 4

    • Dusk
    • Gloom
    • Phosphor
    • Sheen

    Colors and sea folk 11

    • Beryl
    • Celadon
    • Murmur
    • Naiad
    • Nereid
    • Sapphire
    • Selkie
    • Siren
    • Teal
    • Viridian
    • Whisper

    How this list was compiled: Our own choice of 42 English words, made on 2026-10-03; the plan also asked for coined syllables, and none is used, because a made-up syllable is often a word in a living language. Every name the Opening and Ending rows can spell was checked that day, as one word and as two, against places of 500 people and up worldwide and the tables of the United States, Canada, the United Kingdom, Ireland, Australia, New Zealand, South Africa, Jamaica, the Bahamas, Belize and the Turks and Caicos Islands in GeoNames (https://download.geonames.org/export/dump/, CC BY 4.0), an English dictionary, every list on this site, a rude-word list read across the join (https://github.com/LDNOOBW/List-of-Dirty-Naughty-Obscene-and-Otherwise-Bad-Words), a list of names from published games, books and films, the page titles of 16 fantasy fan wikis, and exact page titles on English Wikipedia and on 12 fan wikis (lotr.fandom.com, forgottenrealms.fandom.com, elderscrolls.fandom.com, witcher.fandom.com, dragonage.fandom.com, gameofthrones.fandom.com, wot.fandom.com, harrypotter.fandom.com, wowpedia.fandom.com, pathfinder.fandom.com, criticalrole.fandom.com, zelda.fandom.com). The part behind a match was cut. 28 candidates were cut (10 a rude word inside or across the join; 6 a real place on the map; 5 on another list of this site; 3 a fan wiki page title when written as two words; 2 other reasons; 1 a name from published fiction, or one letter from it; 1 a Wikipedia page title), among them Whirlpool, Saltwater, Luster, Midnight, Nautilus, Seaglass, Krill and Swell, and in the finishing pass Coral (Coral Terrace, Florida), Pearl (Pearl Lagoon, Nicaragua), Aurora, Opal, Deepwater, Undertow, Jade and Cerulean (the last three each spelled a page title on a fan wiki of a published game). 6 of the 756 names left are also the name of a reef, shoal or lagoon in those tables when written as two words (Beryl Reef, Ripple Reef, Ripple Shoal, Riptide Reef, Teal Lagoon and Urchin Shoal). No list of places or fiction is complete, so search a name before you publish it. Licence: own work

    Ending: all 18 endings

    C 2

    • cavern A large cave.
    • chasm A deep, steep-sided rift or gap.

    D 2

    • deep The deep part of a sea or ocean.
    • drift The act or motion of drifting.

    F 1

    • forest A dense tract of trees, or any dense collection of things.

    G 1

    • grotto A small cave.
    Show all 18 endings (12 more)

    L 2

    • lagoon Shallow water cut off from the deeper sea by a bar.
    • ledge A narrow surface that juts out from a wall or cliff.

    R 3

    • reef A chain of rocks, sand or coral at or near the surface of the water.
    • rift A chasm or fissure.
    • rise Ground that slopes upward.

    S 2

    • shelf A ledge; also a reef, sandbar or shoal.
    • shoal A sandbank or sandbar that makes the water shallow.

    T 3

    • terrace A flat, raised open area.
    • trench A long, narrow ditch; the deepest water in the ocean lies in trenches.
    • trough A long, narrow dip between waves or ridges.

    V 2

    • vault An arched roof, or the room under one.
    • vent An opening that gases can pass through.

    How this list was compiled: 18 English words for places under water. The meaning beside each follows its entry in English Wiktionary, read on 2026-10-03 (https://en.wiktionary.org/wiki/reef and the entries for the other words; CC BY-SA 4.0); the wording is ours, and the line on trenches also follows the English Wikipedia article Pelagic zone. Spire, basin, arch, pool and dome are left out because other town pages of this site use them as name parts, and cove and garden because they spelled real places with several openings (Coral Cove and Whisper Cove are real places; Vortex Garden and Jade Garden are Wikipedia titles). The screen of the joined names is described in the Opening row's source. Licence: own selection; meanings from English Wiktionary (CC BY-SA 4.0)

    Lies in: all 5 depth zones

    A 1

    • the abyssal zone Abyssopelagic: 4,000 to 6,000 m (13,100 to 19,700 ft). Near freezing, with only a few creatures.

    H 1

    • the hadal zone Hadopelagic: deeper than 6,000 m (19,700 ft), in ocean trenches. Named for Hades.

    M 1

    • the midnight zone Bathypelagic: 1,000 to 4,000 m (3,300 to 13,100 ft). Dark but for animals that glow.

    S 1

    • the sunlight zone Epipelagic: surface to 200 m (660 ft). The only zone with enough light for photosynthesis.

    T 1

    • the twilight zone Mesopelagic: 200 to 1,000 m (660 to 3,300 ft). Sunlight this deep is very faint.
    How this list was compiled

    The five depth zones of the open ocean, from the surface to the trenches, with the depth range of each. Names and ranges follow the Layers of the Ocean page of the US National Oceanic and Atmospheric Administration (https://www.noaa.gov/jetstream/ocean/layers-of-ocean), read on 2026-10-03, and the English Wikipedia article Pelagic zone (https://en.wikipedia.org/wiki/Pelagic_zone), read the same day; a script checked each range and each line against both texts. Feet are as the first page rounds them. Licence: own wording; facts from a US government page (public domain) and English Wikipedia (CC BY-SA 4.0)

    Lit by: all 30 lights

    A 4

    • a great lens at the top of the tallest tower
    • a ring of cold blue torches
    • a thousand glowing brittle stars
    • anglerfish lures hung at every corner

    B 2

    • blue plankton that flash when stirred
    • bubbles of light let up each hour

    C 3

    • comb jellies drifting like slow rainbows
    • coral that glows green after dark
    • crystal lamps tuned to whale song
    Show all 30 lights (21 more)

    E 2

    • eels that spark when the bells ring
    • the eyes of something vast and asleep

    F 1

    • firefly squid that gather each spring

    G 3

    • glass floats filled with glowing sand
    • glowing jellyfish kept in glass globes
    • glowworm threads strung between the roofs

    J 1

    • jelly lanterns that pulse like a heartbeat

    L 3

    • lamps of bottled lightning
    • lantern kelp grown along every road
    • lanternfish that school along the streets

    M 1

    • moss that shines on every wall

    P 1

    • pearls that give back light all night

    R 2

    • the red glow of a vent far below
    • rivers of shining krill

    S 5

    • sea pens that glow when brushed
    • shells with a cold flame inside
    • silver fish that turn like mirrors
    • sparks struck from singing stones
    • starfish that burn a soft orange

    V 1

    • veins of glowing ore in the bedrock

    W 1

    • windows of thin shell lit from inside

    How this list was compiled: Our own list of 30 lights, written on 2026-10-03 to read after the words "lit by". None is sunlight or moonlight, so each line fits a city at any depth. No line names a real place. Licence: own work