Headspace_logo_svg
Try for freeTry for free
SleepcastSubmarine Slumber

Submarine Slumber

Captain Cadeau invites you on a nighttime voyage in the deep sea. Visit glowing reefs and kelp forest — and let the sea lull you to sleep.

Try 14 days free
Share:

Better mental health starts with Headspace. Unrivaled expertise to make life feel a little easier, using guided meditations, mindfulness tips, focus tools, sleep support, and dedicated programs.

Try 14 days free
Better mental health starts with Headspace

(faint beeping) Prepare for (indistinct). (item screeching) (water splashing) It's a calm night at sea, and our research submarine, the Nocturnia, has just launched. (soft music) Captain Jean Claude Cado is at the helm, joined by Renard, the first mate, Dr. Romy, the researcher, Simone, the scientific illustrator, and AJ, the photographer. We're so pleased that you could join us too. (soft music) We've saved you a seat in the observation room, where you can relax and watch the whole underwater world go by, a kaleidoscope of kelp forests, coral reefs, and other marvelous marine ecosystems. (mystical music) As we get underway, let's pause for a brief wind down exercise. (mystical music) Tonight's exercise is a really simple breathing exercise. (mystical music) So when you're ready, let's begin. (mystical music) So first, get yourself comfortable. (mystical music) Now just bringing the attention to the breath, (mystical music) just noticing where you feel it (mystical music) in the nose, the throat, (mystical music) the chest, the diaphragm. (mystical music) You're nice and relaxed. (mystical music) We're going to be taking a deep breath in for four, holding it for four, and then breathing out for six. (mystical music) So are you ready? (mystical music) Let's begin. (mystical music) In for four, two, three four. Hold it for four, two, three, four, (mystical music) now breathing out for six, two, three, four, five, six. In for four, (mystical music) two, three, four. Holding for four, two, three, four. Out for six, (mystical music) two, three, four, five, six. In for four, two, three, four. Holding for four, two, three, four. (mystical music) Out for six, two, three, four, five, six. (mystical music) In for four, two, three, four. Holding for four, two, three, four. Out for six, (mystical music) two, three, four, five, six. Great. Now returning the breath to normal, (water calmly roaring) Moving in into colder waters, we find ourselves in the enchanted kelp forest. (water softly bubbling) A sea otter drifts above the canopy, cradling the cracked shell of a sea urchin in its furry forepaws as it floats past. (sonar dinging) (water calmly roaring) As we drift down, milky light shimmers through thick columns of copper-colored kelp, which rise all the way from the ocean floor to the sea's surface, enormous as trees. (water softly bubbling) The Nocturnia navigates through the chartreuse tendrils, which twist and rustle With the current. (water calmly bubbling) In the understory, the corridors of kelp seem to go on and on in the distance, blurry and dreamlike. (water calmly bubbling) A rockfish maneuvers its mottled body between the leafy blades. (water calmly bubbling) Shiny sea bass weave down the long hallways of light. Now a school of rainbow fish shimmers past, every bit as colorful as their name would suggest. (water calmly bubbling) Turquoise gills give way to yellow scales, which deepen to red's tails. (water calmly bubbling) Then in one fluid movement, the rainbow fish form a cone and shimmer upward and away through the thick fronds. (water calmly bubbling) On...

Details

TypeSleepcast
Duration45 min

About your teachers

  • Andy Puddicome
    Andy PuddicomeHeadspace Co-founder

    A former Buddhist monk, Andy has guided people in meditation and mindfulness for 20 years. In his mission to make these practices accessible to all, he co-created the Headspace app in 2010.

    More about Andy
  • Eve Lewis Prieto
    Eve Lewis PrietoHeadspace Director of Meditation

    Eve is a mindfulness teacher, overseeing Headspace’s meditation curriculum. She is passionate about sharing meditation to help others feel less stressed and experience more compassion in their lives.

    More about Eve
  • Dora Kamau
    Dora KamauMeditation Teacher

    As a meditation teacher, Dora encourages others to live, breathe, and be with the fullness of their experiences. She loves meditation’s power to create community and bring clarity to people’s minds.

    More about Dora
  • Kessonga Giscombe
    Kessonga GiscombeMeditation Teacher

    Kessonga has been an acupuncturists, therapist, and meditation teacher, working to bring mindfulness to the diverse populations of the world.

    More about Kessonga
  • Rosie Acosta
    Rosie AcostaMeditation Teacher

    Rosie Acosta has studied yoga and mindfulness for more than 20 years and taught for over a decade. Rosie’s mission is to help others overcome adversity and experience radical love.

    More about Rosie
Your lifelong guide to better mental health

Your lifelong guide to better mental health

Stress, sleep, and all the challenging emotions — care for your mind with the everyday mental health app that's shown to make a difference.

Try 14 days free
Look After Your Mind

Look after your mind

Proven guided meditations and programs to help you stress less, sleep more soundly, and better navigate life’s challenges

Science Backed

Science-backed

Studies show that using Headspace for 30 days can reduce stress, increase resilience, and improve overall well-being

Explore Content

Explore 1000+ 
expert-led exercises

Access our library of meditations, breathing exercises, and guidance videos for stress, sleep, focus, everyday anxiety , parenting, and more.

Frame 370079
Star 1
Star 2
Frame 370079 (2)
Frame 370346
Frame 370079 (1)

Members are enjoying happier and healthier lives

More to explore

Beginning Meditation

Explore-More-Icon-02

Reframe Stress and Relax

Explore-More-Icon-01

New and Popular

Explore-More-Icon-03

Becoming a Mindful Parent

Explore-More-Icon-04
  • Legals
    • Terms & conditions
    • Privacy policy
    • Consumer Health Data
    • Your privacy choices
      Privacy Choices Icon
    • CA Privacy Notice
  • © 2026 Headspace Inc.
  • Terms & conditions
  • Privacy policy
  • Consumer Health Data
  • Your privacy choices
    Privacy Choices Icon
  • CA Privacy Notice